octave-nkf: libcruft/arpack/src/snaup2.f annotate

annotate libcruft/arpack/src/snaup2.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\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	2 c
9f5d2ef078e8 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\Name: snaup2
9f5d2ef078e8 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
9f5d2ef078e8 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\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	6 c Intermediate level interface called by snaupd.
9f5d2ef078e8 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
9f5d2ef078e8 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\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	9 c call snaup2
9f5d2ef078e8 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 ( 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	11 c ISHIFT, MXITER, V, LDV, H, LDH, 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	12 c 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	13 c
9f5d2ef078e8 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\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	15 c
9f5d2ef078e8 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 IDO, BMAT, N, WHICH, NEV, TOL, RESID: same as defined in snaupd.
9f5d2ef078e8 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 MODE, ISHIFT, MXITER: see the definition of IPARAM in snaupd.
9f5d2ef078e8 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
9f5d2ef078e8 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 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	20 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	21 c each 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	22 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	23 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	24 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	25 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	26 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	27 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	28 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	29 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	30 c NP may be less than NCV-NEV for two reasons. The first, is
9f5d2ef078e8 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 to keep complex conjugate pairs of "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	32 c together. The second, is that 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	33 c upper Hessenberg 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	34 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	35 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	36 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	37 c
9f5d2ef078e8 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 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	39 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	40 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	41 c
9f5d2ef078e8 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 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	43 c The Arnoldi basis vectors are returned in the first 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	44 c columns of 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	45 c
9f5d2ef078e8 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 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	47 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	48 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	49 c
9f5d2ef078e8 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 H Real (NEV+NP) by (NEV+NP) 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	51 c H is used to store the generated upper Hessenberg 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	52 c
9f5d2ef078e8 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 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	54 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	55 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	56 c
9f5d2ef078e8 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 RITZR, Real arrays 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	58 c RITZI RITZR(1:NEV) (resp. RITZI(1:NEV)) contains the real (resp.
9f5d2ef078e8 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 imaginary) part of 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	60 c
9f5d2ef078e8 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 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	62 c BOUNDS(1:NEV) contain the error bounds corresponding 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	63 c the computed 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	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 work array of length 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	74 c (NEV+NP)*2 + 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	75 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	76 c the front end. It is used in shifts calculation, 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	77 c application 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
9f5d2ef078e8 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 On exit, the last 3*(NEV+NP) locations of WORKL contain
9f5d2ef078e8 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 the Ritz values (real,imaginary) and 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	81 c estimates of the current Hessenberg matrix. They 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	82 c listed in the same order as returned from sneigh.
9f5d2ef078e8 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
9f5d2ef078e8 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 If ISHIFT .EQ. O and IDO .EQ. 3, the first 2*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	85 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	86 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	87 c
9f5d2ef078e8 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 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	89 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	90 c vectors used by the 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	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 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	93 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	94 c IPNTR(3): pointer to the vector B * X when used 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	95 c shift-and-invert mode. X is the current 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	96 c -------------------------------------------------------------
9f5d2ef078e8 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
9f5d2ef078e8 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 WORKD Real work array of length 3*N. (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	99 c Distributed array to be used in the basic 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	100 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	101 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	102 c See Data Distribution Note in DNAUPD.
9f5d2ef078e8 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
9f5d2ef078e8 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 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	105 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	106 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	107 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	108 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	109 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	110 c = 1: Maximum number of iterations taken.
9f5d2ef078e8 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 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	112 c NP returns the number of 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	113 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	114 c = -8: Error return from LAPACK 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	115 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	116 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	117 c = -9999: Could not build an Arnoldi 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	118 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	119 c
9f5d2ef078e8 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\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	121 c
9f5d2ef078e8 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-----------------------------------------------------------------------
9f5d2ef078e8 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
9f5d2ef078e8 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\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	125 c
9f5d2ef078e8 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\Local 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	127 c xxxxxx 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	128 c
9f5d2ef078e8 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\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	130 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	131 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	132 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	133 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	134 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	135 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	136 c
9f5d2ef078e8 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\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	138 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	139 c snaitr ARPACK Arnoldi 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	140 c snapps 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	141 c snconv 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	142 c sneigh 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	143 c sngets 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	144 c ssortc 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	145 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	146 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	147 c smout ARPACK utility routine that prints matrices
9f5d2ef078e8 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 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	149 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	150 c slapy2 LAPACK routine to compute sqrt(x2+y2) carefully.
9f5d2ef078e8 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 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	152 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	153 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	154 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	155 c
9f5d2ef078e8 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\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	157 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	158 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	159 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	160 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	161 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	162 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	163 c
9f5d2ef078e8 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\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	165 c FILE: naup2.F SID: 2.8 DATE OF SID: 10/17/00 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	166 c
9f5d2ef078e8 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\Remarks
9f5d2ef078e8 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 1. None
9f5d2ef078e8 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
9f5d2ef078e8 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\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	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-----------------------------------------------------------------------
9f5d2ef078e8 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
9f5d2ef078e8 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 subroutine snaup2
9f5d2ef078e8 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 & ( 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	176 & ishift, mxiter, v, ldv, h, ldh, 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	177 & 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	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 c %----------------------------------------------------%
9f5d2ef078e8 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 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	181 c %----------------------------------------------------%
9f5d2ef078e8 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 c
9f5d2ef078e8 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 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	184 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	185 c
9f5d2ef078e8 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 \| 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	188 c %------------------%
9f5d2ef078e8 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 c
9f5d2ef078e8 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 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	191 integer ido, info, ishift, iupd, mode, 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	192 & n, 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	193 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	194 & 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	195 c
9f5d2ef078e8 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 c %-----------------%
9f5d2ef078e8 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 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	198 c %-----------------%
9f5d2ef078e8 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 c
9f5d2ef078e8 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 integer ipntr(13)
9f5d2ef078e8 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 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	202 & bounds(nev+np), h(ldh,nev+np), 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	203 & ritzi(nev+np), ritzr(nev+np), v(ldv,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	204 & workd(3n), workl( (nev+np)(nev+np+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	205 c
9f5d2ef078e8 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 c %------------%
9f5d2ef078e8 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 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	208 c %------------%
9f5d2ef078e8 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 c
9f5d2ef078e8 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 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	211 & 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	212 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	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 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	216 c %---------------%
9f5d2ef078e8 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 c
9f5d2ef078e8 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 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	219 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	220 integer ierr , iter , j , kplusp, msglvl, 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	221 & nevbef, nev0 , np0 , nptemp, numcnv
9f5d2ef078e8 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 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	223 & 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	224 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	225 & rnorm , iter , eps23, kplusp, msglvl, 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	226 & nevbef, nev0 , np0 , numcnv
9f5d2ef078e8 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 c
9f5d2ef078e8 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 c %-----------------------%
9f5d2ef078e8 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 c \| Local 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	230 c %-----------------------%
9f5d2ef078e8 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 c
9f5d2ef078e8 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 integer kp(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	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 %----------------------%
9f5d2ef078e8 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 \| 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	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 c
9f5d2ef078e8 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 external scopy , sgetv0, snaitr, snconv, sneigh,
9f5d2ef078e8 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 & sngets, snapps, svout , ivout , arscnd
9f5d2ef078e8 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 %--------------------%
9f5d2ef078e8 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 \| 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	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 c
9f5d2ef078e8 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 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	246 & sdot, snrm2, slapy2, 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 external sdot, snrm2, slapy2, 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	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 %---------------------%
9f5d2ef078e8 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 \| 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	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 c
9f5d2ef078e8 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 intrinsic min, max, abs, sqrt
9f5d2ef078e8 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 %-----------------------%
9f5d2ef078e8 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 \| 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	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 c
9f5d2ef078e8 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 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	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 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	262 c
9f5d2ef078e8 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 msglvl = mnaup2
9f5d2ef078e8 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 c %-------------------------------------%
9f5d2ef078e8 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 c \| Get the 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	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 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	270 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	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 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	273 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	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 \| 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	277 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	278 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	279 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	280 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	281 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	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 kplusp = 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	285 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	286 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	287 c
9f5d2ef078e8 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 %---------------------------------------%
9f5d2ef078e8 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 \| Set flags for computing the first 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	290 c \| steps of the Arnoldi 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	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 c
9f5d2ef078e8 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 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	294 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	295 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	296 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	297 c
9f5d2ef078e8 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 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	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 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	302 c %--------------------------------------------%
9f5d2ef078e8 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 c
9f5d2ef078e8 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 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	305 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	306 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	307 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	308 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	309 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	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 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	313 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	314 c %---------------------------------------------%
9f5d2ef078e8 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 c
9f5d2ef078e8 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 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	317 c
9f5d2ef078e8 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 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	319 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	320 & 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	321 c
9f5d2ef078e8 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 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	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 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	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 c %-----------------------------------------%
9f5d2ef078e8 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 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	328 c %-----------------------------------------%
9f5d2ef078e8 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 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	331 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	332 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	333 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	334 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	335 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	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 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	339 c \| 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	340 c %-----------------------------------%
9f5d2ef078e8 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 c
9f5d2ef078e8 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 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	343 c
9f5d2ef078e8 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 \| 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	346 c %-------------------------------------------%
9f5d2ef078e8 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 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	349 c
9f5d2ef078e8 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 \| 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	352 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	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 (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	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 \| Compute the first NEV steps of the Arnoldi 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	359 c %----------------------------------------------------------%
9f5d2ef078e8 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 call snaitr (ido, bmat, n, 0, nev, 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	362 & 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	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 \| 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	366 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	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 c
9f5d2ef078e8 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 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	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 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	372 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	373 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	374 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	375 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	376 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	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 c %--------------------------------------------------------------%
9f5d2ef078e8 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 \| M A I N ARNOLDI 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	381 c \| Each iteration implicitly restarts the Arnoldi \|
9f5d2ef078e8 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 \| 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	383 c \| \|
9f5d2ef078e8 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 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	387 c
9f5d2ef078e8 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 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	389 c
9f5d2ef078e8 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 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	391 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	392 & '_naup2: ** 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	393 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	394 c
9f5d2ef078e8 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 %-----------------------------------------------------------%
9f5d2ef078e8 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 \| Compute NP additional steps of the Arnoldi 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	397 c \| Adjust NP since NEV might have been updated by last call \|
9f5d2ef078e8 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 \| to the shift application routine snapps. \|
9f5d2ef078e8 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 c
9f5d2ef078e8 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 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	402 c
9f5d2ef078e8 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 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	404 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	405 & '_naup2: The length of the current Arnoldi 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	406 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	407 & '_naup2: Extend the Arnoldi 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	408 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	409 c
9f5d2ef078e8 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 c %-----------------------------------------------------------%
9f5d2ef078e8 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 c \| Compute NP additional steps of the Arnoldi 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	412 c %-----------------------------------------------------------%
9f5d2ef078e8 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 c
9f5d2ef078e8 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 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	415 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	416 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	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 call snaitr (ido , bmat, n , nev, np , mode , 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	419 & rnorm, v , ldv, h , ldh, ipntr, 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	420 & 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	421 c
9f5d2ef078e8 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 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	424 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	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 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	428 c
9f5d2ef078e8 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 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	430 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	431 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	432 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	433 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	434 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	435 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	436 c
9f5d2ef078e8 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 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	438 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	439 & '_naup2: Corresponding B-norm of the 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	440 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	441 c
9f5d2ef078e8 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 c %--------------------------------------------------------%
9f5d2ef078e8 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 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	444 c \| of the current upper Hessenberg 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	445 c %--------------------------------------------------------%
9f5d2ef078e8 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 c
9f5d2ef078e8 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 call sneigh (rnorm, kplusp, h, ldh, 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	448 & q, ldq, 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	449 c
9f5d2ef078e8 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 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	451 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	452 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	453 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	454 c
9f5d2ef078e8 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 %----------------------------------------------------%
9f5d2ef078e8 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 \| 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	457 c \| bounds obtained from sneigh. \|
9f5d2ef078e8 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 c %----------------------------------------------------%
9f5d2ef078e8 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 call scopy(kplusp, ritzr, 1, workl(kplusp**2+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	461 call scopy(kplusp, ritzi, 1, workl(kplusp**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	462 call scopy(kplusp, bounds, 1, workl(kplusp*2+2kplusp+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	463 c
9f5d2ef078e8 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 \| 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	466 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	467 c \| The wanted part of the spectrum and corresponding \|
9f5d2ef078e8 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 \| error bounds are in the last NEV loc. of RITZR, \|
9f5d2ef078e8 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 \| RITZI and BOUNDS respectively. The variables 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	470 c \| and NP may be updated if the NEV-th wanted 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	471 c \| value has a non zero imaginary part. In this 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	472 c \| NEV is increased by one and NP decreased by one. \|
9f5d2ef078e8 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 \| NOTE: The last two arguments of sngets are no \|
9f5d2ef078e8 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 \| longer used as of version 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	475 c %---------------------------------------------------%
9f5d2ef078e8 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
9f5d2ef078e8 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 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	478 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	479 numcnv = 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	480 call sngets (ishift, which, nev, np, ritzr, ritzi,
9f5d2ef078e8 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 & bounds, workl, workl(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	482 if (nev .eq. nev0+1) numcnv = nev0+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	483 c
9f5d2ef078e8 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 c %-------------------%
9f5d2ef078e8 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 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	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 call scopy (nev, bounds(np+1), 1, workl(2*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	489 call snconv (nev, ritzr(np+1), ritzi(np+1), workl(2*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	490 & 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	491 c
9f5d2ef078e8 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 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	493 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	494 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	495 kp(3) = numcnv
9f5d2ef078e8 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(4) = 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	497 call ivout (logfil, 4, 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	498 & '_naup2: NEV, NP, NUMCNV, 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	499 call svout (logfil, kplusp, ritzr, 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	500 & '_naup2: Real part of 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	501 call svout (logfil, kplusp, ritzi, 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	502 & '_naup2: Imaginary part of 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	503 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	504 & '_naup2: 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	505 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	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 %---------------------------------------------------------%
9f5d2ef078e8 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 \| 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	509 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	510 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	511 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	512 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	513 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	514 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	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 c
9f5d2ef078e8 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 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	518 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	519 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	520 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	521 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	522 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	523 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	524 c
9f5d2ef078e8 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 if ( (nconv .ge. numcnv) .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 & (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	527 & (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	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 if (msglvl .gt. 4) 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	530 call svout(logfil, kplusp, workl(kplusp**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	531 & '_naup2: Real part of the eig computed by _neigh:')
9f5d2ef078e8 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 call svout(logfil, kplusp, workl(kplusp**2+kplusp+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	533 & 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	534 & '_naup2: Imag part of the eig computed by _neigh:')
9f5d2ef078e8 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 call svout(logfil, kplusp, workl(kplusp*2+kplusp2+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	536 & 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	537 & '_naup2: Ritz eistmates computed by _neigh:')
9f5d2ef078e8 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 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	539 c
9f5d2ef078e8 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 %------------------------------------------------%
9f5d2ef078e8 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 \| 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	542 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	543 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	544 c \| careful when NCONV > 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	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 c %------------------------------------------%
9f5d2ef078e8 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 c \| Use h( 3,1 ) 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	549 c \| rnorm to _neupd 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	550 c %------------------------------------------%
9f5d2ef078e8 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
9f5d2ef078e8 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 h(3,1) = 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	553 c
9f5d2ef078e8 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 c %----------------------------------------------%
9f5d2ef078e8 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 c \| To be consistent with sngets, we first do a \|
9f5d2ef078e8 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 c \| pre-processing sort in order to keep complex \|
9f5d2ef078e8 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 \| conjugate pairs together. This is similar \|
9f5d2ef078e8 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 c \| to the pre-processing sort used in sngets \|
9f5d2ef078e8 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 \| except that the sort is done in the opposite \|
9f5d2ef078e8 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 \| order. \|
9f5d2ef078e8 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 %----------------------------------------------%
9f5d2ef078e8 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
9f5d2ef078e8 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 if (which .eq. 'LM') wprime = 'SR'
9f5d2ef078e8 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 if (which .eq. 'SM') wprime = 'LR'
9f5d2ef078e8 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 if (which .eq. 'LR') 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	566 if (which .eq. 'SR') 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	567 if (which .eq. 'LI') 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	568 if (which .eq. 'SI') 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	569 c
9f5d2ef078e8 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 call ssortc (wprime, .true., kplusp, 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	571 c
9f5d2ef078e8 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 c %----------------------------------------------%
9f5d2ef078e8 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 \| Now sort Ritz values so that converged 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	574 c \| values appear within the first 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	575 c \| of ritzr, ritzi and bounds, and the most \|
9f5d2ef078e8 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 c \| desired one appears at the front. \|
9f5d2ef078e8 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 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	580 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	581 if (which .eq. 'LR') wprime = 'SR'
9f5d2ef078e8 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 if (which .eq. 'SR') wprime = 'LR'
9f5d2ef078e8 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 if (which .eq. 'LI') wprime = 'SI'
9f5d2ef078e8 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 if (which .eq. 'SI') wprime = 'LI'
9f5d2ef078e8 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 c
9f5d2ef078e8 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 call ssortc(wprime, .true., kplusp, 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	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 \| 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	590 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	591 c %--------------------------------------------------%
9f5d2ef078e8 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
9f5d2ef078e8 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 do 35 j = 1, numcnv
9f5d2ef078e8 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 temp = max(eps23,slapy2(ritzr(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	595 & ritzi(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	596 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	597 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	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 %----------------------------------------------------%
9f5d2ef078e8 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 \| 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	601 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	602 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	603 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	604 c %----------------------------------------------------%
9f5d2ef078e8 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 c
9f5d2ef078e8 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 wprime = 'LR'
9f5d2ef078e8 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 call ssortc(wprime, .true., numcnv, bounds, ritzr, ritzi)
9f5d2ef078e8 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 %----------------------------------------------%
9f5d2ef078e8 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 \| 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	611 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	612 c %----------------------------------------------%
9f5d2ef078e8 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 do 40 j = 1, numcnv
9f5d2ef078e8 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 temp = max(eps23, slapy2(ritzr(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	616 & ritzi(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	617 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	618 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	619 c
9f5d2ef078e8 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 %------------------------------------------------%
9f5d2ef078e8 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 \| 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	622 c \| the "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	623 c \| ritzr, ritzi 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	624 c %------------------------------------------------%
9f5d2ef078e8 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 call ssortc(which, .true., nconv, 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	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 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	629 call svout (logfil, kplusp, ritzr, 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	630 & '_naup2: Sorted real part of 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	631 call svout (logfil, kplusp, ritzi, 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	632 & '_naup2: Sorted imaginary part of 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	633 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	634 & '_naup2: 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	635 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	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 c %------------------------------------%
9f5d2ef078e8 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 \| 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	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
9f5d2ef078e8 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 if (iter .gt. mxiter .and. nconv .lt. numcnv) 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	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 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	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 c
9f5d2ef078e8 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 if (np .eq. 0 .and. nconv .lt. numcnv) 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	648 c
9f5d2ef078e8 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 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	650 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	651 c
9f5d2ef078e8 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 else if ( (nconv .lt. numcnv) .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	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 %-------------------------------------------------%
9f5d2ef078e8 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 \| 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	656 c \| To prevent possible stagnation, adjust 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	657 c \| of 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	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 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	661 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	662 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	663 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	664 else if (nev .eq. 1 .and. kplusp .gt. 3) 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	665 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	666 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	667 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	668 c
9f5d2ef078e8 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 \| 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	671 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	672 c %---------------------------------------%
9f5d2ef078e8 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
9f5d2ef078e8 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 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	675 & call sngets (ishift, which, nev, np, ritzr, ritzi,
9f5d2ef078e8 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 & bounds, workl, workl(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	677 c
9f5d2ef078e8 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 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	679 c
9f5d2ef078e8 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 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	681 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	682 & '_naup2: 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	683 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	684 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	685 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	686 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	687 & '_naup2: 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	688 call svout (logfil, nev, ritzr(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	689 & '_naup2: "wanted" Ritz values -- real part')
9f5d2ef078e8 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 call svout (logfil, nev, ritzi(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	691 & '_naup2: "wanted" Ritz values -- imag part')
9f5d2ef078e8 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 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	693 & '_naup2: 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	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 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	696 c
9f5d2ef078e8 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 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	698 c
9f5d2ef078e8 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 c %-------------------------------------------------------%
9f5d2ef078e8 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 c \| User specified shifts: reverse comminucation 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	701 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	702 c \| 2*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	703 c %-------------------------------------------------------%
9f5d2ef078e8 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 c
9f5d2ef078e8 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 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	706 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	707 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	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 c
9f5d2ef078e8 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 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	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 c %------------------------------------%
9f5d2ef078e8 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 \| 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	714 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	715 c \| in WORKL(1:2*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	716 c %------------------------------------%
9f5d2ef078e8 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
9f5d2ef078e8 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 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	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 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	721 c
9f5d2ef078e8 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 c %----------------------------------%
9f5d2ef078e8 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 c \| Move the NP shifts from WORKL 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	724 c \| RITZR, RITZI to free up 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	725 c \| for 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	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 call scopy (np, workl, 1, ritzr, 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	729 call scopy (np, workl(np+1), 1, ritzi, 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	730 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	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 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	733 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	734 & '_naup2: 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	735 call svout (logfil, np, ritzr, 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	736 & '_naup2: Real part of 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	737 call svout (logfil, np, ritzi, 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	738 & '_naup2: Imaginary part of 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	739 if ( ishift .eq. 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	740 & 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	741 & '_naup2: Ritz estimates of 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	742 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	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 c %---------------------------------------------------------%
9f5d2ef078e8 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 c \| Apply the NP 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	746 c \| Each shift is applied to the whole upper Hessenberg \|
9f5d2ef078e8 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 c \| matrix 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	748 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	749 c %---------------------------------------------------------%
9f5d2ef078e8 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 c
9f5d2ef078e8 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 call snapps (n, nev, np, ritzr, ritzi, 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	752 & h, ldh, resid, q, ldq, workl, 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	753 c
9f5d2ef078e8 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 \| 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	756 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	757 c \| the first step of the next call to snaitr. \|
9f5d2ef078e8 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 %---------------------------------------------%
9f5d2ef078e8 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
9f5d2ef078e8 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 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	761 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	762 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	763 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	764 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	765 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	766 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	767 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	768 c
9f5d2ef078e8 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 %----------------------------------%
9f5d2ef078e8 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 \| 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	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 c
9f5d2ef078e8 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 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	774 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	775 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	776 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	777 c
9f5d2ef078e8 import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1 John W. Eaton <jwe@octave.org> parents: diff changeset	778 100 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	779 c
9f5d2ef078e8 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 \| 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	782 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	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 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	786 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	787 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	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 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	791 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	792 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	793 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	794 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	795 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	796 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	797 c
9f5d2ef078e8 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 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	799 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	800 & '_naup2: B-norm of residual for compressed 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	801 call smout (logfil, nev, nev, h, ldh, 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	802 & '_naup2: Compressed upper Hessenberg matrix 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	803 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	804 c
9f5d2ef078e8 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 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	806 c
9f5d2ef078e8 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 c %---------------------------------------------------------------%
9f5d2ef078e8 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 c \| \|
9f5d2ef078e8 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 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	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 c %---------------------------------------------------------------%
9f5d2ef078e8 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 c
9f5d2ef078e8 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 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	814 c
9f5d2ef078e8 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 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	816 nev = numcnv
9f5d2ef078e8 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 c
9f5d2ef078e8 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 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	819 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	820 c
9f5d2ef078e8 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 \| 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	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
9f5d2ef078e8 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 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	826 tnaup2 = 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	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 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	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 c %---------------%
9f5d2ef078e8 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 c \| End of snaup2 \|
9f5d2ef078e8 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 c
9f5d2ef078e8 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 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	835 end

Mercurial > octave-nkf

annotate libcruft/arpack/src/snaup2.f @ 12274:9f5d2ef078e8 release-3-4-x