Mercurial > octave
view libinterp/corefcn/symbfact.cc @ 31616:726d2628752c
eliminate unused default_settings variable from resource manager
* resource-manager.h, resource-manager.cc
(resource_manager::m_default_settings):
Delete member variable, accessor function, and all uses.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Fri, 02 Dec 2022 10:10:19 -0500 |
parents | e88a07dec498 |
children | 597f3ee61a48 |
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//////////////////////////////////////////////////////////////////////// // // Copyright (C) 1998-2022 The Octave Project Developers // // See the file COPYRIGHT.md in the top-level directory of this // distribution or <https://octave.org/copyright/>. // // 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 // <https://www.gnu.org/licenses/>. // //////////////////////////////////////////////////////////////////////// #if defined (HAVE_CONFIG_H) # include "config.h" #endif #include <cmath> #include <algorithm> #include <string> #include "CSparse.h" #include "boolSparse.h" #include "dColVector.h" #include "dSparse.h" #include "oct-locbuf.h" #include "oct-sparse.h" #include "oct-spparms.h" #include "sparse-util.h" #include "defun.h" #include "error.h" #include "errwarn.h" #include "ovl.h" #include "parse.h" #include "utils.h" OCTAVE_BEGIN_NAMESPACE(octave) DEFUN (symbfact, args, nargout, doc: /* -*- texinfo -*- @deftypefn {} {[@var{count}, @var{h}, @var{parent}, @var{post}, @var{R}] =} symbfact (@var{S}) @deftypefnx {} {[@dots{}] =} symbfact (@var{S}, @var{typ}) @deftypefnx {} {[@dots{}] =} symbfact (@var{S}, @var{typ}, @var{mode}) Perform a symbolic factorization analysis of the sparse matrix @var{S}. The input variables are @table @var @item S @var{S} is a real or complex sparse matrix. @item typ Is the type of the factorization and can be one of @table @asis @item @qcode{"sym"} (default) Factorize @var{S}. Assumes @var{S} is symmetric and uses the upper triangular portion of the matrix. @item @qcode{"col"} Factorize @tcode{@var{S}' * @var{S}}. @item @qcode{"row"} Factorize @tcode{@var{S} * @var{S}'}. @item @qcode{"lo"} Factorize @tcode{@var{S}'}. Assumes @var{S} is symmetric and uses the lower triangular portion of the matrix. @end table @item mode When @var{mode} is unspecified return the Cholesky@tie{}factorization for @var{R}. If @var{mode} is @qcode{"lower"} or @qcode{"L"} then return the conjugate transpose @tcode{@var{R}'} which is a lower triangular factor. The conjugate transpose version is faster and uses less memory, but still returns the same values for all other outputs: @var{count}, @var{h}, @var{parent}, and @var{post}. @end table The output variables are: @table @var @item count The row counts of the Cholesky@tie{}factorization as determined by @var{typ}. The computational difficulty of performing the true factorization using @code{chol} is @code{sum (@var{count} .^ 2)}. @item h The height of the elimination tree. @item parent The elimination tree itself. @item post A sparse boolean matrix whose structure is that of the Cholesky@tie{}factorization as determined by @var{typ}. @end table @seealso{chol, etree, treelayout} @end deftypefn */) { #if defined (HAVE_CHOLMOD) int nargin = args.length (); if (nargin < 1 || nargin > 3) print_usage (); octave_value_list retval; double dummy; cholmod_sparse Astore; cholmod_sparse *A = &Astore; A->packed = true; A->sorted = true; A->nz = nullptr; #if defined (OCTAVE_ENABLE_64) A->itype = CHOLMOD_LONG; #else A->itype = CHOLMOD_INT; #endif A->dtype = CHOLMOD_DOUBLE; A->stype = 1; A->x = &dummy; SparseMatrix sm; SparseComplexMatrix scm; if (args(0).isreal ()) { sm = args(0).sparse_matrix_value (); A->nrow = sm.rows (); A->ncol = sm.cols (); A->p = sm.cidx (); A->i = sm.ridx (); A->nzmax = sm.nnz (); A->xtype = CHOLMOD_REAL; if (A->nrow > 0 && A->ncol > 0) A->x = sm.data (); } else if (args(0).iscomplex ()) { scm = args(0).sparse_complex_matrix_value (); A->nrow = scm.rows (); A->ncol = scm.cols (); A->p = scm.cidx (); A->i = scm.ridx (); A->nzmax = scm.nnz (); A->xtype = CHOLMOD_COMPLEX; if (A->nrow > 0 && A->ncol > 0) A->x = scm.data (); } else err_wrong_type_arg ("symbfact", args(0)); bool coletree = false; octave_idx_type n = A->nrow; if (nargin > 1) { std::string str = args(1).xstring_value ("TYP must be a string"); // FIXME: The input validation could be improved to use strncmp char ch; ch = tolower (str[0]); if (ch == 'r') // 'row' A->stype = 0; else if (ch == 'c') // 'col' { n = A->ncol; coletree = true; A->stype = 0; } else if (ch == 's') // 'sym' (default) A->stype = 1; else if (ch == 'l') // 'lo' A->stype = -1; else error (R"(symbfact: unrecognized TYP "%s")", str.c_str ()); } if (nargin == 3) { std::string str = args(2).xstring_value ("MODE must be a string"); // FIXME: The input validation could be improved to use strncmp char ch; ch = toupper (str[0]); if (ch != 'L') error (R"(symbfact: unrecognized MODE "%s")", str.c_str ()); } if (A->stype && A->nrow != A->ncol) err_square_matrix_required ("symbfact", "S"); OCTAVE_LOCAL_BUFFER (suitesparse_integer, Parent, n); OCTAVE_LOCAL_BUFFER (suitesparse_integer, Post, n); OCTAVE_LOCAL_BUFFER (suitesparse_integer, ColCount, n); OCTAVE_LOCAL_BUFFER (suitesparse_integer, First, n); OCTAVE_LOCAL_BUFFER (octave_idx_type, Level, n); cholmod_common Common; cholmod_common *cm = &Common; CHOLMOD_NAME(start) (cm); double spu = sparse_params::get_key ("spumoni"); if (spu == 0.0) { cm->print = -1; SUITESPARSE_ASSIGN_FPTR (printf_func, cm->print_function, nullptr); } else { cm->print = static_cast<int> (spu) + 2; SUITESPARSE_ASSIGN_FPTR (printf_func, cm->print_function, &SparseCholPrint); } cm->error_handler = &SparseCholError; SUITESPARSE_ASSIGN_FPTR2 (divcomplex_func, cm->complex_divide, divcomplex); SUITESPARSE_ASSIGN_FPTR2 (hypot_func, cm->hypotenuse, hypot); cholmod_sparse *F = CHOLMOD_NAME(transpose) (A, 0, cm); cholmod_sparse *Aup, *Alo; if (A->stype == 1 || coletree) { Aup = A; Alo = F; } else { Aup = F; Alo = A; } CHOLMOD_NAME(etree) (Aup, Parent, cm); ColumnVector tmp (n); // Declaration must precede any goto cleanup. std::string err_msg; if (cm->status < CHOLMOD_OK) { err_msg = "symbfact: matrix corrupted"; goto cleanup; } if (CHOLMOD_NAME(postorder) (Parent, n, nullptr, Post, cm) != n) { err_msg = "symbfact: postorder failed"; goto cleanup; } CHOLMOD_NAME(rowcolcounts) (Alo, nullptr, 0, Parent, Post, nullptr, ColCount, First, to_suitesparse_intptr (Level), cm); if (cm->status < CHOLMOD_OK) { err_msg = "symbfact: matrix corrupted"; goto cleanup; } if (nargout > 4) { cholmod_sparse *A1, *A2; if (A->stype == 1) { A1 = A; A2 = nullptr; } else if (A->stype == -1) { A1 = F; A2 = nullptr; } else if (coletree) { A1 = F; A2 = A; } else { A1 = A; A2 = F; } // count the total number of entries in L octave_idx_type lnz = 0; for (octave_idx_type j = 0 ; j < n ; j++) lnz += ColCount[j]; // allocate the output matrix L (pattern-only) SparseBoolMatrix L (dim_vector (n, n), lnz); // initialize column pointers lnz = 0; for (octave_idx_type j = 0 ; j < n ; j++) { L.xcidx(j) = lnz; lnz += ColCount[j]; } L.xcidx(n) = lnz; // create a copy of the column pointers suitesparse_integer *W = First; for (octave_idx_type j = 0 ; j < n ; j++) W[j] = L.xcidx (j); // get workspace for computing one row of L cholmod_sparse *R = CHOLMOD_NAME(allocate_sparse) (n, 1, n, false, true, 0, CHOLMOD_PATTERN, cm); octave_idx_type *Rp = static_cast<octave_idx_type *> (R->p); octave_idx_type *Ri = static_cast<octave_idx_type *> (R->i); // compute L one row at a time for (octave_idx_type k = 0 ; k < n ; k++) { // get the kth row of L and store in the columns of L CHOLMOD_NAME(row_subtree) (A1, A2, k, Parent, R, cm); for (octave_idx_type p = 0 ; p < Rp[1] ; p++) L.xridx (W[Ri[p]]++) = k; // add the diagonal entry L.xridx (W[k]++) = k; } // free workspace CHOLMOD_NAME(free_sparse) (&R, cm); // fill L with one's std::fill_n (L.xdata (), lnz, true); // transpose L to get R, or leave as is if (nargin < 3) L = L.transpose (); retval(4) = L; } if (nargout > 3) { for (octave_idx_type i = 0; i < n; i++) tmp(i) = Post[i] + 1; retval(3) = tmp; } if (nargout > 2) { for (octave_idx_type i = 0; i < n; i++) tmp(i) = Parent[i] + 1; retval(2) = tmp; } if (nargout > 1) { // compute the elimination tree height octave_idx_type height = 0; for (int i = 0 ; i < n ; i++) height = std::max (height, Level[i]); height++; retval(1) = static_cast<double> (height); } for (octave_idx_type i = 0; i < n; i++) tmp(i) = ColCount[i]; retval(0) = tmp; cleanup: CHOLMOD_NAME(free_sparse) (&F, cm); CHOLMOD_NAME(finish) (cm); if (! err_msg.empty ()) error ("%s", err_msg.c_str ()); return retval; #else octave_unused_parameter (args); octave_unused_parameter (nargout); err_disabled_feature ("symbfact", "CHOLMOD"); #endif } /* %!testif HAVE_CHOLMOD %! A = sparse (magic (3)); %! [count, h, parent, post, r] = symbfact (A); %! assert (count, [3; 2; 1]); %! assert (h, 3); %! assert (parent, [2; 3; 0]); %! assert (r, sparse (triu (true (3)))); %!testif HAVE_CHOLMOD %! ## Test MODE "lower" %! A = sparse (magic (3)); %! [~, ~, ~, ~, l] = symbfact (A, "sym", "lower"); %! assert (l, sparse (tril (true (3)))); %!testif HAVE_CHOLMOD <*42587> %! ## singular matrix %! A = sparse ([1 0 8;0 1 8;8 8 1]); %! [count, h, parent, post, r] = symbfact (A); ## Test input validation %!testif HAVE_CHOLMOD %! fail ("symbfact ()"); %! fail ("symbfact (1,2,3,4)"); %! fail ("symbfact ({1})", "wrong type argument 'cell'"); %! fail ("symbfact (sparse (1), {1})", "TYP must be a string"); %! fail ("symbfact (sparse (1), 'foobar')", 'unrecognized TYP "foobar"'); %! fail ("symbfact (sparse (1), 'sym', {'L'})", "MODE must be a string"); %! fail ('symbfact (sparse (1), "sym", "foobar")', %! 'unrecognized MODE "foobar"'); %! fail ("symbfact (sparse ([1, 2; 3, 4; 5, 6]))", "S must be a square matrix"); */ OCTAVE_END_NAMESPACE(octave)