Mercurial > octave-nkf
view src/DLD-FUNCTIONS/rcond.cc @ 10154:40dfc0c99116
DLD-FUNCTIONS/*.cc: untabify
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 20 Jan 2010 17:33:41 -0500 |
parents | 16f53d29049f |
children | fd0a3ac60b0e |
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/* Copyright (C) 2008, 2009 David Bateman 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 "defun-dld.h" #include "error.h" #include "gripes.h" #include "oct-obj.h" #include "utils.h" DEFUN_DLD (rcond, args, , "-*- texinfo -*-\n\ @deftypefn {Loadable Function} {@var{c} =} rcond (@var{a})\n\ Compute the 1-norm estimate of the reciprocal condition as returned\n\ by @sc{lapack}. If the matrix is well-conditioned then @var{c} will be near\n\ 1 and if the matrix is poorly conditioned it will be close to zero.\n\ \n\ The matrix @var{a} must not be sparse. If the matrix is sparse then\n\ @code{condest (@var{a})} or @code{rcond (full (@var{a}))} should be used\n\ instead.\n\ @seealso{inv}\n\ @end deftypefn") { octave_value retval; int nargin = args.length (); if (nargin != 1) print_usage (); else if (args(0).is_sparse_type ()) error ("rcond: for sparse matrices use 'rcond (full (a))' or 'condest (a)' instead"); else if (args(0).is_single_type ()) { if (args(0).is_complex_type ()) { FloatComplexMatrix m = args(0).float_complex_matrix_value (); MatrixType mattyp; retval = m.rcond (mattyp); args(0).matrix_type (mattyp); } else { FloatMatrix m = args(0).float_matrix_value (); MatrixType mattyp; retval = m.rcond (mattyp); args(0).matrix_type (mattyp); } } else if (args(0).is_complex_type ()) { ComplexMatrix m = args(0).complex_matrix_value (); MatrixType mattyp; retval = m.rcond (mattyp); args(0).matrix_type (mattyp); } else { Matrix m = args(0).matrix_value (); MatrixType mattyp; retval = m.rcond (mattyp); args(0).matrix_type (mattyp); } return retval; }