octave: libcruft/arpack/src/ssaup2.f annotate

annotate libcruft/arpack/src/ssaup2.f @ 12274:9f5d2ef078e8 release-3-4-x

import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1

author	John W. Eaton <jwe@octave.org>
date	Fri, 28 Jan 2011 14:04:33 -0500
parents
children

rev	line source
12274 9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	1 c-----------------------------------------------------------------------
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	2 c\BeginDoc
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	3 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	4 c\Name: ssaup2
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	5 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	6 c\Description:
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	7 c Intermediate level interface called by ssaupd.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	8 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	9 c\Usage:
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	10 c call ssaup2
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	11 c ( IDO, BMAT, N, WHICH, NEV, NP, TOL, RESID, MODE, IUPD,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	12 c ISHIFT, MXITER, V, LDV, H, LDH, RITZ, BOUNDS, Q, LDQ, WORKL,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	13 c IPNTR, WORKD, INFO )
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	14 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	15 c\Arguments
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	16 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	17 c IDO, BMAT, N, WHICH, NEV, TOL, RESID: same as defined in ssaupd.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	18 c MODE, ISHIFT, MXITER: see the definition of IPARAM in ssaupd.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	19 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	20 c NP Integer. (INPUT/OUTPUT)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	21 c Contains the number of implicit shifts to apply during
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	22 c each Arnoldi/Lanczos iteration.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	23 c If ISHIFT=1, NP is adjusted dynamically at each iteration
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	24 c to accelerate convergence and prevent stagnation.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	25 c This is also roughly equal to the number of matrix-vector
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	26 c products (involving the operator OP) per Arnoldi iteration.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	27 c The logic for adjusting is contained within the current
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	28 c subroutine.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	29 c If ISHIFT=0, NP is the number of shifts the user needs
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	30 c to provide via reverse comunication. 0 < NP < NCV-NEV.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	31 c NP may be less than NCV-NEV since a leading block of the current
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	32 c upper Tridiagonal matrix has split off and contains "unwanted"
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	33 c Ritz values.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	34 c Upon termination of the IRA iteration, NP contains the number
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	35 c of "converged" wanted Ritz values.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	36 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	37 c IUPD Integer. (INPUT)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	38 c IUPD .EQ. 0: use explicit restart instead implicit update.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	39 c IUPD .NE. 0: use implicit update.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	40 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	41 c V Real N by (NEV+NP) array. (INPUT/OUTPUT)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	42 c The Lanczos basis vectors.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	43 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	44 c LDV Integer. (INPUT)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	45 c Leading dimension of V exactly as declared in the calling
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	46 c program.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	47 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	48 c H Real (NEV+NP) by 2 array. (OUTPUT)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	49 c H is used to store the generated symmetric tridiagonal matrix
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	50 c The subdiagonal is stored in the first column of H starting
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	51 c at H(2,1). The main diagonal is stored in the second column
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	52 c of H starting at H(1,2). If ssaup2 converges store the
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	53 c B-norm of the final residual vector in H(1,1).
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	54 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	55 c LDH Integer. (INPUT)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	56 c Leading dimension of H exactly as declared in the calling
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	57 c program.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	58 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	59 c RITZ Real array of length NEV+NP. (OUTPUT)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	60 c RITZ(1:NEV) contains the computed Ritz values of OP.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	61 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	62 c BOUNDS Real array of length NEV+NP. (OUTPUT)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	63 c BOUNDS(1:NEV) contain the error bounds corresponding to RITZ.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	64 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	65 c Q Real (NEV+NP) by (NEV+NP) array. (WORKSPACE)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	66 c Private (replicated) work array used to accumulate the
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	67 c rotation in the shift application step.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	68 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	69 c LDQ Integer. (INPUT)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	70 c Leading dimension of Q exactly as declared in the calling
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	71 c program.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	72 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	73 c WORKL Real array of length at least 3*(NEV+NP). (INPUT/WORKSPACE)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	74 c Private (replicated) array on each PE or array allocated on
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	75 c the front end. It is used in the computation of the
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	76 c tridiagonal eigenvalue problem, the calculation and
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	77 c application of the shifts and convergence checking.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	78 c If ISHIFT .EQ. O and IDO .EQ. 3, the first NP locations
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	79 c of WORKL are used in reverse communication to hold the user
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	80 c supplied shifts.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	81 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	82 c IPNTR Integer array of length 3. (OUTPUT)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	83 c Pointer to mark the starting locations in the WORKD for
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	84 c vectors used by the Lanczos iteration.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	85 c -------------------------------------------------------------
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	86 c IPNTR(1): pointer to the current operand vector X.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	87 c IPNTR(2): pointer to the current result vector Y.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	88 c IPNTR(3): pointer to the vector B * X when used in one of
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	89 c the spectral transformation modes. X is the current
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	90 c operand.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	91 c -------------------------------------------------------------
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	92 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	93 c WORKD Real work array of length 3*N. (REVERSE COMMUNICATION)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	94 c Distributed array to be used in the basic Lanczos iteration
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	95 c for reverse communication. The user should not use WORKD
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	96 c as temporary workspace during the iteration !!!!!!!!!!
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	97 c See Data Distribution Note in ssaupd.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	98 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	99 c INFO Integer. (INPUT/OUTPUT)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	100 c If INFO .EQ. 0, a randomly initial residual vector is used.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	101 c If INFO .NE. 0, RESID contains the initial residual vector,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	102 c possibly from a previous run.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	103 c Error flag on output.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	104 c = 0: Normal return.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	105 c = 1: All possible eigenvalues of OP has been found.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	106 c NP returns the size of the invariant subspace
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	107 c spanning the operator OP.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	108 c = 2: No shifts could be applied.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	109 c = -8: Error return from trid. eigenvalue calculation;
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	110 c This should never happen.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	111 c = -9: Starting vector is zero.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	112 c = -9999: Could not build an Lanczos factorization.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	113 c Size that was built in returned in NP.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	114 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	115 c\EndDoc
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	116 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	117 c-----------------------------------------------------------------------
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	118 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	119 c\BeginLib
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	120 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	121 c\References:
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	122 c 1. D.C. Sorensen, "Implicit Application of Polynomial Filters in
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	123 c a k-Step Arnoldi Method", SIAM J. Matr. Anal. Apps., 13 (1992),
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	124 c pp 357-385.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	125 c 2. R.B. Lehoucq, "Analysis and Implementation of an Implicitly
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	126 c Restarted Arnoldi Iteration", Rice University Technical Report
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	127 c TR95-13, Department of Computational and Applied Mathematics.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	128 c 3. B.N. Parlett, "The Symmetric Eigenvalue Problem". Prentice-Hall,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	129 c 1980.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	130 c 4. B.N. Parlett, B. Nour-Omid, "Towards a Black Box Lanczos Program",
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	131 c Computer Physics Communications, 53 (1989), pp 169-179.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	132 c 5. B. Nour-Omid, B.N. Parlett, T. Ericson, P.S. Jensen, "How to
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	133 c Implement the Spectral Transformation", Math. Comp., 48 (1987),
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	134 c pp 663-673.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	135 c 6. R.G. Grimes, J.G. Lewis and H.D. Simon, "A Shifted Block Lanczos
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	136 c Algorithm for Solving Sparse Symmetric Generalized Eigenproblems",
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	137 c SIAM J. Matr. Anal. Apps., January (1993).
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	138 c 7. L. Reichel, W.B. Gragg, "Algorithm 686: FORTRAN Subroutines
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	139 c for Updating the QR decomposition", ACM TOMS, December 1990,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	140 c Volume 16 Number 4, pp 369-377.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	141 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	142 c\Routines called:
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	143 c sgetv0 ARPACK initial vector generation routine.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	144 c ssaitr ARPACK Lanczos factorization routine.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	145 c ssapps ARPACK application of implicit shifts routine.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	146 c ssconv ARPACK convergence of Ritz values routine.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	147 c sseigt ARPACK compute Ritz values and error bounds routine.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	148 c ssgets ARPACK reorder Ritz values and error bounds routine.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	149 c ssortr ARPACK sorting routine.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	150 c ivout ARPACK utility routine that prints integers.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	151 c arscnd ARPACK utility routine for timing.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	152 c svout ARPACK utility routine that prints vectors.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	153 c slamch LAPACK routine that determines machine constants.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	154 c scopy Level 1 BLAS that copies one vector to another.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	155 c sdot Level 1 BLAS that computes the scalar product of two vectors.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	156 c snrm2 Level 1 BLAS that computes the norm of a vector.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	157 c sscal Level 1 BLAS that scales a vector.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	158 c sswap Level 1 BLAS that swaps two vectors.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	159 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	160 c\Author
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	161 c Danny Sorensen Phuong Vu
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	162 c Richard Lehoucq CRPC / Rice University
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	163 c Dept. of Computational & Houston, Texas
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	164 c Applied Mathematics
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	165 c Rice University
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	166 c Houston, Texas
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	167 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	168 c\Revision history:
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	169 c 12/15/93: Version ' 2.4'
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	170 c xx/xx/95: Version ' 2.4'. (R.B. Lehoucq)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	171 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	172 c\SCCS Information: @(#)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	173 c FILE: saup2.F SID: 2.7 DATE OF SID: 5/19/98 RELEASE: 2
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	174 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	175 c\EndLib
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	176 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	177 c-----------------------------------------------------------------------
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	178 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	179 subroutine ssaup2
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	180 & ( ido, bmat, n, which, nev, np, tol, resid, mode, iupd,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	181 & ishift, mxiter, v, ldv, h, ldh, ritz, bounds,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	182 & q, ldq, workl, ipntr, workd, info )
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	183 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	184 c %----------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	185 c \| Include files for debugging and timing information \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	186 c %----------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	187 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	188 include 'debug.h'
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	189 include 'stat.h'
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	190 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	191 c %------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	192 c \| Scalar Arguments \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	193 c %------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	194 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	195 character bmat1, which2
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	196 integer ido, info, ishift, iupd, ldh, ldq, ldv, mxiter,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	197 & n, mode, nev, np
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	198 Real
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	199 & tol
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	200 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	201 c %-----------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	202 c \| Array Arguments \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	203 c %-----------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	204 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	205 integer ipntr(3)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	206 Real
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	207 & bounds(nev+np), h(ldh,2), q(ldq,nev+np), resid(n),
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	208 & ritz(nev+np), v(ldv,nev+np), workd(3*n),
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	209 & workl(3*(nev+np))
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	210 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	211 c %------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	212 c \| Parameters \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	213 c %------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	214 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	215 Real
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	216 & one, zero
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	217 parameter (one = 1.0E+0, zero = 0.0E+0)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	218 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	219 c %---------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	220 c \| Local Scalars \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	221 c %---------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	222 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	223 character wprime*2
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	224 logical cnorm, getv0, initv, update, ushift
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	225 integer ierr, iter, j, kplusp, msglvl, nconv, nevbef, nev0,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	226 & np0, nptemp, nevd2, nevm2, kp(3)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	227 Real
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	228 & rnorm, temp, eps23
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	229 save cnorm, getv0, initv, update, ushift,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	230 & iter, kplusp, msglvl, nconv, nev0, np0,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	231 & rnorm, eps23
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	232 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	233 c %----------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	234 c \| External Subroutines \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	235 c %----------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	236 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	237 external scopy, sgetv0, ssaitr, sscal, ssconv, sseigt, ssgets,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	238 & ssapps, ssortr, svout, ivout, arscnd, sswap
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	239 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	240 c %--------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	241 c \| External Functions \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	242 c %--------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	243 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	244 Real
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	245 & sdot, snrm2, slamch
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	246 external sdot, snrm2, slamch
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	247 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	248 c %---------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	249 c \| Intrinsic Functions \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	250 c %---------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	251 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	252 intrinsic min
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	253 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	254 c %-----------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	255 c \| Executable Statements \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	256 c %-----------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	257 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	258 if (ido .eq. 0) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	259 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	260 c %-------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	261 c \| Initialize timing statistics \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	262 c \| & message level for debugging \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	263 c %-------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	264 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	265 call arscnd (t0)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	266 msglvl = msaup2
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	267 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	268 c %---------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	269 c \| Set machine dependent constant. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	270 c %---------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	271 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	272 eps23 = slamch('Epsilon-Machine')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	273 eps23 = eps23**(2.0E+0/3.0E+0)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	274 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	275 c %-------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	276 c \| nev0 and np0 are integer variables \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	277 c \| hold the initial values of NEV & NP \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	278 c %-------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	279 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	280 nev0 = nev
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	281 np0 = np
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	282 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	283 c %-------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	284 c \| kplusp is the bound on the largest \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	285 c \| Lanczos factorization built. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	286 c \| nconv is the current number of \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	287 c \| "converged" eigenvlues. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	288 c \| iter is the counter on the current \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	289 c \| iteration step. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	290 c %-------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	291 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	292 kplusp = nev0 + np0
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	293 nconv = 0
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	294 iter = 0
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	295 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	296 c %--------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	297 c \| Set flags for computing the first NEV steps \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	298 c \| of the Lanczos factorization. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	299 c %--------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	300 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	301 getv0 = .true.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	302 update = .false.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	303 ushift = .false.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	304 cnorm = .false.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	305 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	306 if (info .ne. 0) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	307 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	308 c %--------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	309 c \| User provides the initial residual vector. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	310 c %--------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	311 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	312 initv = .true.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	313 info = 0
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	314 else
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	315 initv = .false.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	316 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	317 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	318 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	319 c %---------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	320 c \| Get a possibly random starting vector and \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	321 c \| force it into the range of the operator OP. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	322 c %---------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	323 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	324 10 continue
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	325 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	326 if (getv0) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	327 call sgetv0 (ido, bmat, 1, initv, n, 1, v, ldv, resid, rnorm,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	328 & ipntr, workd, info)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	329 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	330 if (ido .ne. 99) go to 9000
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	331 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	332 if (rnorm .eq. zero) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	333 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	334 c %-----------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	335 c \| The initial vector is zero. Error exit. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	336 c %-----------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	337 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	338 info = -9
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	339 go to 1200
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	340 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	341 getv0 = .false.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	342 ido = 0
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	343 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	344 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	345 c %------------------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	346 c \| Back from reverse communication: continue with update step \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	347 c %------------------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	348 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	349 if (update) go to 20
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	350 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	351 c %-------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	352 c \| Back from computing user specified shifts \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	353 c %-------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	354 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	355 if (ushift) go to 50
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	356 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	357 c %-------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	358 c \| Back from computing residual norm \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	359 c \| at the end of the current iteration \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	360 c %-------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	361 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	362 if (cnorm) go to 100
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	363 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	364 c %----------------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	365 c \| Compute the first NEV steps of the Lanczos factorization \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	366 c %----------------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	367 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	368 call ssaitr (ido, bmat, n, 0, nev0, mode, resid, rnorm, v, ldv,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	369 & h, ldh, ipntr, workd, info)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	370 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	371 c %---------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	372 c \| ido .ne. 99 implies use of reverse communication \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	373 c \| to compute operations involving OP and possibly B \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	374 c %---------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	375 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	376 if (ido .ne. 99) go to 9000
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	377 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	378 if (info .gt. 0) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	379 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	380 c %-----------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	381 c \| ssaitr was unable to build an Lanczos factorization \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	382 c \| of length NEV0. INFO is returned with the size of \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	383 c \| the factorization built. Exit main loop. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	384 c %-----------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	385 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	386 np = info
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	387 mxiter = iter
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	388 info = -9999
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	389 go to 1200
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	390 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	391 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	392 c %--------------------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	393 c \| \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	394 c \| M A I N LANCZOS I T E R A T I O N L O O P \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	395 c \| Each iteration implicitly restarts the Lanczos \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	396 c \| factorization in place. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	397 c \| \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	398 c %--------------------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	399 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	400 1000 continue
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	401 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	402 iter = iter + 1
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	403 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	404 if (msglvl .gt. 0) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	405 call ivout (logfil, 1, iter, ndigit,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	406 & '_saup2: ** Start of major iteration number **')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	407 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	408 if (msglvl .gt. 1) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	409 call ivout (logfil, 1, nev, ndigit,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	410 & '_saup2: The length of the current Lanczos factorization')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	411 call ivout (logfil, 1, np, ndigit,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	412 & '_saup2: Extend the Lanczos factorization by')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	413 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	414 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	415 c %------------------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	416 c \| Compute NP additional steps of the Lanczos factorization. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	417 c %------------------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	418 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	419 ido = 0
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	420 20 continue
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	421 update = .true.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	422 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	423 call ssaitr (ido, bmat, n, nev, np, mode, resid, rnorm, v,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	424 & ldv, h, ldh, ipntr, workd, info)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	425 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	426 c %---------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	427 c \| ido .ne. 99 implies use of reverse communication \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	428 c \| to compute operations involving OP and possibly B \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	429 c %---------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	430 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	431 if (ido .ne. 99) go to 9000
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	432 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	433 if (info .gt. 0) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	434 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	435 c %-----------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	436 c \| ssaitr was unable to build an Lanczos factorization \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	437 c \| of length NEV0+NP0. INFO is returned with the size \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	438 c \| of the factorization built. Exit main loop. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	439 c %-----------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	440 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	441 np = info
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	442 mxiter = iter
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	443 info = -9999
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	444 go to 1200
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	445 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	446 update = .false.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	447 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	448 if (msglvl .gt. 1) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	449 call svout (logfil, 1, rnorm, ndigit,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	450 & '_saup2: Current B-norm of residual for factorization')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	451 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	452 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	453 c %--------------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	454 c \| Compute the eigenvalues and corresponding error bounds \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	455 c \| of the current symmetric tridiagonal matrix. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	456 c %--------------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	457 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	458 call sseigt (rnorm, kplusp, h, ldh, ritz, bounds, workl, ierr)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	459 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	460 if (ierr .ne. 0) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	461 info = -8
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	462 go to 1200
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	463 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	464 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	465 c %----------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	466 c \| Make a copy of eigenvalues and corresponding error \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	467 c \| bounds obtained from _seigt. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	468 c %----------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	469 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	470 call scopy(kplusp, ritz, 1, workl(kplusp+1), 1)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	471 call scopy(kplusp, bounds, 1, workl(2*kplusp+1), 1)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	472 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	473 c %---------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	474 c \| Select the wanted Ritz values and their bounds \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	475 c \| to be used in the convergence test. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	476 c \| The selection is based on the requested number of \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	477 c \| eigenvalues instead of the current NEV and NP to \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	478 c \| prevent possible misconvergence. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	479 c \| * Wanted Ritz values := RITZ(NP+1:NEV+NP) \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	480 c \| * Shifts := RITZ(1:NP) := WORKL(1:NP) \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	481 c %---------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	482 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	483 nev = nev0
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	484 np = np0
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	485 call ssgets (ishift, which, nev, np, ritz, bounds, workl)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	486 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	487 c %-------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	488 c \| Convergence test. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	489 c %-------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	490 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	491 call scopy (nev, bounds(np+1), 1, workl(np+1), 1)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	492 call ssconv (nev, ritz(np+1), workl(np+1), tol, nconv)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	493 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	494 if (msglvl .gt. 2) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	495 kp(1) = nev
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	496 kp(2) = np
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	497 kp(3) = nconv
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	498 call ivout (logfil, 3, kp, ndigit,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	499 & '_saup2: NEV, NP, NCONV are')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	500 call svout (logfil, kplusp, ritz, ndigit,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	501 & '_saup2: The eigenvalues of H')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	502 call svout (logfil, kplusp, bounds, ndigit,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	503 & '_saup2: Ritz estimates of the current NCV Ritz values')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	504 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	505 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	506 c %---------------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	507 c \| Count the number of unwanted Ritz values that have zero \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	508 c \| Ritz estimates. If any Ritz estimates are equal to zero \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	509 c \| then a leading block of H of order equal to at least \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	510 c \| the number of Ritz values with zero Ritz estimates has \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	511 c \| split off. None of these Ritz values may be removed by \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	512 c \| shifting. Decrease NP the number of shifts to apply. If \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	513 c \| no shifts may be applied, then prepare to exit \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	514 c %---------------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	515 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	516 nptemp = np
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	517 do 30 j=1, nptemp
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	518 if (bounds(j) .eq. zero) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	519 np = np - 1
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	520 nev = nev + 1
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	521 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	522 30 continue
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	523 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	524 if ( (nconv .ge. nev0) .or.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	525 & (iter .gt. mxiter) .or.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	526 & (np .eq. 0) ) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	527 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	528 c %------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	529 c \| Prepare to exit. Put the converged Ritz values \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	530 c \| and corresponding bounds in RITZ(1:NCONV) and \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	531 c \| BOUNDS(1:NCONV) respectively. Then sort. Be \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	532 c \| careful when NCONV > NP since we don't want to \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	533 c \| swap overlapping locations. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	534 c %------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	535 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	536 if (which .eq. 'BE') then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	537 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	538 c %-----------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	539 c \| Both ends of the spectrum are requested. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	540 c \| Sort the eigenvalues into algebraically decreasing \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	541 c \| order first then swap low end of the spectrum next \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	542 c \| to high end in appropriate locations. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	543 c \| NOTE: when np < floor(nev/2) be careful not to swap \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	544 c \| overlapping locations. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	545 c %-----------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	546 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	547 wprime = 'SA'
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	548 call ssortr (wprime, .true., kplusp, ritz, bounds)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	549 nevd2 = nev0 / 2
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	550 nevm2 = nev0 - nevd2
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	551 if ( nev .gt. 1 ) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	552 call sswap ( min(nevd2,np), ritz(nevm2+1), 1,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	553 & ritz( max(kplusp-nevd2+1,kplusp-np+1) ), 1)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	554 call sswap ( min(nevd2,np), bounds(nevm2+1), 1,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	555 & bounds( max(kplusp-nevd2+1,kplusp-np+1)), 1)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	556 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	557 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	558 else
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	559 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	560 c %--------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	561 c \| LM, SM, LA, SA case. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	562 c \| Sort the eigenvalues of H into the an order that \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	563 c \| is opposite to WHICH, and apply the resulting \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	564 c \| order to BOUNDS. The eigenvalues are sorted so \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	565 c \| that the wanted part are always within the first \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	566 c \| NEV locations. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	567 c %--------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	568 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	569 if (which .eq. 'LM') wprime = 'SM'
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	570 if (which .eq. 'SM') wprime = 'LM'
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	571 if (which .eq. 'LA') wprime = 'SA'
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	572 if (which .eq. 'SA') wprime = 'LA'
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	573 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	574 call ssortr (wprime, .true., kplusp, ritz, bounds)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	575 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	576 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	577 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	578 c %--------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	579 c \| Scale the Ritz estimate of each Ritz value \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	580 c \| by 1 / max(eps23,magnitude of the Ritz value). \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	581 c %--------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	582 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	583 do 35 j = 1, nev0
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	584 temp = max( eps23, abs(ritz(j)) )
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	585 bounds(j) = bounds(j)/temp
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	586 35 continue
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	587 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	588 c %----------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	589 c \| Sort the Ritz values according to the scaled Ritz \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	590 c \| esitmates. This will push all the converged ones \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	591 c \| towards the front of ritzr, ritzi, bounds \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	592 c \| (in the case when NCONV < NEV.) \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	593 c %----------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	594 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	595 wprime = 'LA'
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	596 call ssortr(wprime, .true., nev0, bounds, ritz)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	597 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	598 c %----------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	599 c \| Scale the Ritz estimate back to its original \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	600 c \| value. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	601 c %----------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	602 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	603 do 40 j = 1, nev0
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	604 temp = max( eps23, abs(ritz(j)) )
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	605 bounds(j) = bounds(j)*temp
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	606 40 continue
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	607 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	608 c %--------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	609 c \| Sort the "converged" Ritz values again so that \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	610 c \| the "threshold" values and their associated Ritz \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	611 c \| estimates appear at the appropriate position in \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	612 c \| ritz and bound. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	613 c %--------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	614 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	615 if (which .eq. 'BE') then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	616 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	617 c %------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	618 c \| Sort the "converged" Ritz values in increasing \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	619 c \| order. The "threshold" values are in the \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	620 c \| middle. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	621 c %------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	622 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	623 wprime = 'LA'
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	624 call ssortr(wprime, .true., nconv, ritz, bounds)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	625 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	626 else
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	627 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	628 c %----------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	629 c \| In LM, SM, LA, SA case, sort the "converged" \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	630 c \| Ritz values according to WHICH so that the \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	631 c \| "threshold" value appears at the front of \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	632 c \| ritz. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	633 c %----------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	634
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	635 call ssortr(which, .true., nconv, ritz, bounds)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	636 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	637 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	638 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	639 c %------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	640 c \| Use h( 1,1 ) as storage to communicate \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	641 c \| rnorm to _seupd if needed \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	642 c %------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	643 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	644 h(1,1) = rnorm
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	645 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	646 if (msglvl .gt. 1) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	647 call svout (logfil, kplusp, ritz, ndigit,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	648 & '_saup2: Sorted Ritz values.')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	649 call svout (logfil, kplusp, bounds, ndigit,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	650 & '_saup2: Sorted ritz estimates.')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	651 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	652 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	653 c %------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	654 c \| Max iterations have been exceeded. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	655 c %------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	656 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	657 if (iter .gt. mxiter .and. nconv .lt. nev) info = 1
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	658 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	659 c %---------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	660 c \| No shifts to apply. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	661 c %---------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	662 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	663 if (np .eq. 0 .and. nconv .lt. nev0) info = 2
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	664 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	665 np = nconv
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	666 go to 1100
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	667 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	668 else if (nconv .lt. nev .and. ishift .eq. 1) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	669 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	670 c %---------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	671 c \| Do not have all the requested eigenvalues yet. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	672 c \| To prevent possible stagnation, adjust the number \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	673 c \| of Ritz values and the shifts. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	674 c %---------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	675 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	676 nevbef = nev
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	677 nev = nev + min (nconv, np/2)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	678 if (nev .eq. 1 .and. kplusp .ge. 6) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	679 nev = kplusp / 2
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	680 else if (nev .eq. 1 .and. kplusp .gt. 2) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	681 nev = 2
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	682 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	683 np = kplusp - nev
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	684 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	685 c %---------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	686 c \| If the size of NEV was just increased \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	687 c \| resort the eigenvalues. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	688 c %---------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	689 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	690 if (nevbef .lt. nev)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	691 & call ssgets (ishift, which, nev, np, ritz, bounds,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	692 & workl)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	693 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	694 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	695 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	696 if (msglvl .gt. 0) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	697 call ivout (logfil, 1, nconv, ndigit,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	698 & '_saup2: no. of "converged" Ritz values at this iter.')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	699 if (msglvl .gt. 1) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	700 kp(1) = nev
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	701 kp(2) = np
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	702 call ivout (logfil, 2, kp, ndigit,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	703 & '_saup2: NEV and NP are')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	704 call svout (logfil, nev, ritz(np+1), ndigit,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	705 & '_saup2: "wanted" Ritz values.')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	706 call svout (logfil, nev, bounds(np+1), ndigit,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	707 & '_saup2: Ritz estimates of the "wanted" values ')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	708 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	709 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	710
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	711 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	712 if (ishift .eq. 0) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	713 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	714 c %-----------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	715 c \| User specified shifts: reverse communication to \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	716 c \| compute the shifts. They are returned in the first \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	717 c \| NP locations of WORKL. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	718 c %-----------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	719 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	720 ushift = .true.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	721 ido = 3
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	722 go to 9000
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	723 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	724 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	725 50 continue
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	726 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	727 c %------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	728 c \| Back from reverse communication; \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	729 c \| User specified shifts are returned \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	730 c \| in WORKL(1:*NP) \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	731 c %------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	732 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	733 ushift = .false.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	734 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	735 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	736 c %---------------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	737 c \| Move the NP shifts to the first NP locations of RITZ to \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	738 c \| free up WORKL. This is for the non-exact shift case; \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	739 c \| in the exact shift case, ssgets already handles this. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	740 c %---------------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	741 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	742 if (ishift .eq. 0) call scopy (np, workl, 1, ritz, 1)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	743 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	744 if (msglvl .gt. 2) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	745 call ivout (logfil, 1, np, ndigit,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	746 & '_saup2: The number of shifts to apply ')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	747 call svout (logfil, np, workl, ndigit,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	748 & '_saup2: shifts selected')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	749 if (ishift .eq. 1) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	750 call svout (logfil, np, bounds, ndigit,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	751 & '_saup2: corresponding Ritz estimates')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	752 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	753 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	754 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	755 c %---------------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	756 c \| Apply the NP0 implicit shifts by QR bulge chasing. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	757 c \| Each shift is applied to the entire tridiagonal matrix. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	758 c \| The first 2*N locations of WORKD are used as workspace. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	759 c \| After ssapps is done, we have a Lanczos \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	760 c \| factorization of length NEV. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	761 c %---------------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	762 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	763 call ssapps (n, nev, np, ritz, v, ldv, h, ldh, resid, q, ldq,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	764 & workd)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	765 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	766 c %---------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	767 c \| Compute the B-norm of the updated residual. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	768 c \| Keep B*RESID in WORKD(1:N) to be used in \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	769 c \| the first step of the next call to ssaitr. \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	770 c %---------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	771 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	772 cnorm = .true.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	773 call arscnd (t2)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	774 if (bmat .eq. 'G') then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	775 nbx = nbx + 1
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	776 call scopy (n, resid, 1, workd(n+1), 1)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	777 ipntr(1) = n + 1
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	778 ipntr(2) = 1
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	779 ido = 2
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	780 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	781 c %----------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	782 c \| Exit in order to compute B*RESID \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	783 c %----------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	784 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	785 go to 9000
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	786 else if (bmat .eq. 'I') then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	787 call scopy (n, resid, 1, workd, 1)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	788 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	789 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	790 100 continue
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	791 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	792 c %----------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	793 c \| Back from reverse communication; \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	794 c \| WORKD(1:N) := B*RESID \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	795 c %----------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	796 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	797 if (bmat .eq. 'G') then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	798 call arscnd (t3)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	799 tmvbx = tmvbx + (t3 - t2)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	800 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	801 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	802 if (bmat .eq. 'G') then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	803 rnorm = sdot (n, resid, 1, workd, 1)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	804 rnorm = sqrt(abs(rnorm))
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	805 else if (bmat .eq. 'I') then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	806 rnorm = snrm2(n, resid, 1)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	807 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	808 cnorm = .false.
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	809 130 continue
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	810 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	811 if (msglvl .gt. 2) then
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	812 call svout (logfil, 1, rnorm, ndigit,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	813 & '_saup2: B-norm of residual for NEV factorization')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	814 call svout (logfil, nev, h(1,2), ndigit,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	815 & '_saup2: main diagonal of compressed H matrix')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	816 call svout (logfil, nev-1, h(2,1), ndigit,
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	817 & '_saup2: subdiagonal of compressed H matrix')
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	818 end if
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	819 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	820 go to 1000
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	821 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	822 c %---------------------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	823 c \| \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	824 c \| E N D O F M A I N I T E R A T I O N L O O P \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	825 c \| \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	826 c %---------------------------------------------------------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	827 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	828 1100 continue
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	829 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	830 mxiter = iter
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	831 nev = nconv
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	832 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	833 1200 continue
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	834 ido = 99
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	835 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	836 c %------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	837 c \| Error exit \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	838 c %------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	839 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	840 call arscnd (t1)
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	841 tsaup2 = t1 - t0
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	842 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	843 9000 continue
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	844 return
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	845 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	846 c %---------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	847 c \| End of ssaup2 \|
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	848 c %---------------%
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	849 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	850 end

Mercurial > octave

annotate libcruft/arpack/src/ssaup2.f @ 12274:9f5d2ef078e8 release-3-4-x