Mercurial > octave-dspies
view liboctave/numeric/floatHESS.cc @ 19010:3fb030666878 draft default tip dspies
Added special-case logical-indexing function
* logical-index.h (New file) : Logical-indexing function. May be called on
octave_value types via call_bool_index
* nz-iterators.h : Add base-class nz_iterator for iterator types. Array has
template bool for whether to internally store row-col or compute on the fly
Add skip_ahead method which skips forward to the next nonzero after its
argument
Add flat_index for computing octave_idx_type index of current position (with
assertion failure in the case of overflow)
Move is_zero to separate file
* ov-base-diag.cc, ov-base-mat.cc, ov-base-sparse.cc, ov-perm.cc
(do_index_op): Add call to call_bool_index in logical-index.h
* Array.h : Move forward-declaration for array_iterator to separate header file
* dim-vector.cc (dim_max): Refers to idx-bounds.h (max_idx)
* array-iter-decl.h (New file): Header file for forward declaration of
array-iterator
* direction.h : Add constants fdirc and bdirc to avoid having to reconstruct
them
* dv-utils.h, dv-utils.cc (New files) :
Utility functions for querying and constructing dim-vectors
* idx-bounds.h (New file) :
Utility constants and functions for determining whether things will overflow
the maximum allowed bounds
* interp-idx.h (New function : to_flat_idx) : Converts row-col pair to linear
index of octave_idx_type
* is-zero.h (New file) : Function for determining whether an element is zero
* logical-index.tst : Add tests for correct return-value dimensions and large
sparse matrix behavior
author | David Spies <dnspies@gmail.com> |
---|---|
date | Fri, 25 Jul 2014 13:39:31 -0600 |
parents | d63878346099 |
children |
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/* Copyright (C) 1994-2013 John W. Eaton This file is part of Octave. Octave is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. Octave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ #ifdef HAVE_CONFIG_H #include <config.h> #endif #include "floatHESS.h" #include "f77-fcn.h" #include "lo-error.h" extern "C" { F77_RET_T F77_FUNC (sgebal, SGEBAL) (F77_CONST_CHAR_ARG_DECL, const octave_idx_type&, float*, const octave_idx_type&, octave_idx_type&, octave_idx_type&, float*, octave_idx_type& F77_CHAR_ARG_LEN_DECL); F77_RET_T F77_FUNC (sgehrd, SGEHRD) (const octave_idx_type&, const octave_idx_type&, const octave_idx_type&, float*, const octave_idx_type&, float*, float*, const octave_idx_type&, octave_idx_type&); F77_RET_T F77_FUNC (sorghr, SORGHR) (const octave_idx_type&, const octave_idx_type&, const octave_idx_type&, float*, const octave_idx_type&, float*, float*, const octave_idx_type&, octave_idx_type&); F77_RET_T F77_FUNC (sgebak, SGEBAK) (F77_CONST_CHAR_ARG_DECL, F77_CONST_CHAR_ARG_DECL, const octave_idx_type&, const octave_idx_type&, const octave_idx_type&, float*, const octave_idx_type&, float*, const octave_idx_type&, octave_idx_type& F77_CHAR_ARG_LEN_DECL F77_CHAR_ARG_LEN_DECL); } octave_idx_type FloatHESS::init (const FloatMatrix& a) { octave_idx_type a_nr = a.rows (); octave_idx_type a_nc = a.cols (); if (a_nr != a_nc) { (*current_liboctave_error_handler) ("FloatHESS requires square matrix"); return -1; } char job = 'N'; char side = 'R'; octave_idx_type n = a_nc; octave_idx_type lwork = 32 * n; octave_idx_type info; octave_idx_type ilo; octave_idx_type ihi; hess_mat = a; float *h = hess_mat.fortran_vec (); Array<float> scale (dim_vector (n, 1)); float *pscale = scale.fortran_vec (); F77_XFCN (sgebal, SGEBAL, (F77_CONST_CHAR_ARG2 (&job, 1), n, h, n, ilo, ihi, pscale, info F77_CHAR_ARG_LEN (1))); Array<float> tau (dim_vector (n-1, 1)); float *ptau = tau.fortran_vec (); Array<float> work (dim_vector (lwork, 1)); float *pwork = work.fortran_vec (); F77_XFCN (sgehrd, SGEHRD, (n, ilo, ihi, h, n, ptau, pwork, lwork, info)); unitary_hess_mat = hess_mat; float *z = unitary_hess_mat.fortran_vec (); F77_XFCN (sorghr, SORGHR, (n, ilo, ihi, z, n, ptau, pwork, lwork, info)); F77_XFCN (sgebak, SGEBAK, (F77_CONST_CHAR_ARG2 (&job, 1), F77_CONST_CHAR_ARG2 (&side, 1), n, ilo, ihi, pscale, n, z, n, info F77_CHAR_ARG_LEN (1) F77_CHAR_ARG_LEN (1))); // If someone thinks of a more graceful way of doing // this (or faster for that matter :-)), please let // me know! if (n > 2) for (octave_idx_type j = 0; j < a_nc; j++) for (octave_idx_type i = j+2; i < a_nr; i++) hess_mat.elem (i, j) = 0; return info; }