Mercurial > octave
view libinterp/corefcn/sylvester.cc @ 30346:91c6288781ba
maint: Shorten some long lines in libinterp to <= 80 characters (bug #57599)
* __isprimelarge__.cc, bsxfun.cc, cellfun.cc, chol.cc, data.cc, error.h,
event-manager.h, filter.cc, find.cc, gcd.cc, gl-render.h, gl2ps-print.cc,
graphics.cc, graphics.in.h, hash.cc, help.cc, hex2num.cc, input.cc, inv.cc,
load-path.cc, load-save.cc, ls-hdf5.cc, ls-hdf5.h, ls-mat5.cc, lu.cc,
mappers.cc, matrix_type.cc, max.cc, mex.cc, mxarray.h, oct-errno.in.cc,
oct-map.cc, oct-stream.cc, oct-stream.h, pr-output.cc, psi.cc, qr.cc, rand.cc,
regexp.cc, sparse-xdiv.h, stack-frame.cc, strfind.cc, strfns.cc, sylvester.cc,
symbfact.cc, symrec.h, symscope.cc, typecast.cc, utils.cc, variables.h, xdiv.h,
xpow.h, __init_fltk__.cc, __ode15__.cc, audiodevinfo.cc, audioread.cc,
convhulln.cc, cdef-class.cc, cdef-class.h, cdef-manager.cc, cdef-method.cc,
cdef-object.cc, cdef-object.h, cdef-package.h, cdef-utils.cc, ov-base-diag.cc,
ov-base-int.cc, ov-base.h, ov-bool-mat.cc, ov-bool.cc, ov-cell.cc,
ov-ch-mat.cc, ov-class.cc, ov-class.h, ov-classdef.cc, ov-colon.h,
ov-complex.cc, ov-cx-mat.cc, ov-cx-sparse.cc, ov-dld-fcn.h, ov-fcn-handle.cc,
ov-float.cc, ov-flt-complex.cc, ov-flt-cx-diag.cc, ov-flt-cx-mat.cc,
ov-flt-re-diag.cc, ov-flt-re-mat.cc, ov-java.cc, ov-lazy-idx.cc, ov-lazy-idx.h,
ov-range.cc, ov-re-mat.cc, ov-re-mat.h, ov-re-sparse.cc, ov-scalar.cc,
ov-str-mat.cc, ov-struct.cc, ov-typeinfo.cc, ov.cc, ov.h, octave.h,
bp-table.cc, bp-table.h, lex.h, oct-lvalue.h, profiler.cc, profiler.h,
pt-binop.h, pt-colon.cc, pt-eval.cc, pt-exp.h, pt-select.h:
Shorten some long lines in libinterp to <= 80 characters.
author | Rik <rik@octave.org> |
---|---|
date | Wed, 24 Nov 2021 09:38:51 -0800 |
parents | 32c3a5805893 |
children | 83f9f8bda883 |
line wrap: on
line source
//////////////////////////////////////////////////////////////////////// // // Copyright (C) 1996-2021 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 "defun.h" #include "error.h" #include "errwarn.h" #include "ovl.h" OCTAVE_NAMESPACE_BEGIN DEFUN (sylvester, args, , doc: /* -*- texinfo -*- @deftypefn {} {@var{X} =} sylvester (@var{A}, @var{B}, @var{C}) Solve the Sylvester equation. The Sylvester equation is defined as: @tex $$ A X + X B = C $$ @end tex @ifnottex @example A X + X B = C @end example @end ifnottex The solution is computed using standard @sc{lapack} subroutines. For example: @example @group sylvester ([1, 2; 3, 4], [5, 6; 7, 8], [9, 10; 11, 12]) @result{} [ 0.50000, 0.66667; 0.66667, 0.50000 ] @end group @end example @end deftypefn */) { if (args.length () != 3) print_usage (); octave_value retval; octave_value arg_a = args(0); octave_value arg_b = args(1); octave_value arg_c = args(2); octave_idx_type a_nr = arg_a.rows (); octave_idx_type a_nc = arg_a.columns (); octave_idx_type b_nr = arg_b.rows (); octave_idx_type b_nc = arg_b.columns (); octave_idx_type c_nr = arg_c.rows (); octave_idx_type c_nc = arg_c.columns (); bool isfloat = arg_a.is_single_type () || arg_b.is_single_type () || arg_c.is_single_type (); if (arg_a.isempty () || arg_b.isempty () || arg_c.isempty ()) { if (isfloat) return ovl (FloatMatrix ()); else return ovl (Matrix ()); } // Arguments are not empty, so check for correct dimensions. if (a_nr != a_nc) err_square_matrix_required ("sylvester", "A"); if (b_nr != b_nc) err_square_matrix_required ("sylvester", "B"); if (a_nr != c_nr || b_nr != c_nc) ::err_nonconformant (); if (isfloat) { if (arg_a.iscomplex () || arg_b.iscomplex () || arg_c.iscomplex ()) { // Do everything in complex arithmetic; FloatComplexMatrix ca = arg_a.float_complex_matrix_value (); FloatComplexMatrix cb = arg_b.float_complex_matrix_value (); FloatComplexMatrix cc = arg_c.float_complex_matrix_value (); retval = Sylvester (ca, cb, cc); } else { // Do everything in real arithmetic. FloatMatrix ca = arg_a.float_matrix_value (); FloatMatrix cb = arg_b.float_matrix_value (); FloatMatrix cc = arg_c.float_matrix_value (); retval = Sylvester (ca, cb, cc); } } else { if (arg_a.iscomplex () || arg_b.iscomplex () || arg_c.iscomplex ()) { // Do everything in complex arithmetic; ComplexMatrix ca = arg_a.complex_matrix_value (); ComplexMatrix cb = arg_b.complex_matrix_value (); ComplexMatrix cc = arg_c.complex_matrix_value (); retval = Sylvester (ca, cb, cc); } else { // Do everything in real arithmetic. Matrix ca = arg_a.matrix_value (); Matrix cb = arg_b.matrix_value (); Matrix cc = arg_c.matrix_value (); retval = Sylvester (ca, cb, cc); } } return retval; } /* %!assert (sylvester ([1, 2; 3, 4], [5, 6; 7, 8], [9, 10; 11, 12]), %! [1/2, 2/3; 2/3, 1/2], sqrt (eps)) %!assert (sylvester (single ([1, 2; 3, 4]), single ([5, 6; 7, 8]), single ([9, 10; 11, 12])), %! single ([1/2, 2/3; 2/3, 1/2]), sqrt (eps ("single"))) ## Test input validation %!error sylvester () %!error sylvester (1) %!error sylvester (1,2) %!error sylvester (1, 2, 3, 4) %!error <A must be a square matrix> sylvester (ones (2,3), ones (2,2), ones (2,2)) %!error <B must be a square matrix> sylvester (ones (2,2), ones (2,3), ones (2,2)) %!error <nonconformant matrices> sylvester (ones (2,2), ones (2,2), ones (3,3)) */ OCTAVE_NAMESPACE_END