Mercurial > octave
view libinterp/corefcn/colloc.cc @ 21220:d78e45987d6a
rename octave::build_env namespace from octave::config
* build-env-features.sh: Rename from ocgt-conf-features.sh.
Update for new names.
* build-env.h: Rename from oct-conf.h. Also declare features function.
* build-env.in.cc: Rename from oct-conf.in.cc.
* oct-conf-features.h: Delete.
* libinterp/module.mk: Update.
* toplev.cc, __init_gnuplot__.cc, octave.cc: Update for new names.
author | John W. Eaton <jwe@octave.org> |
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date | Sun, 07 Feb 2016 14:56:17 -0500 |
parents | fcac5dbbf9ed |
children | 40de9f8f23a6 |
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/* Copyright (C) 1996-2015 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 <string> #include "CollocWt.h" #include "lo-mappers.h" #include "defun.h" #include "error.h" #include "ovl.h" #include "utils.h" DEFUN (colloc, args, , "-*- texinfo -*-\n\ @deftypefn {} {[@var{r}, @var{amat}, @var{bmat}, @var{q}] =} colloc (@var{n}, \"left\", \"right\")\n\ Compute derivative and integral weight matrices for orthogonal collocation.\n\ \n\ Reference: @nospell{J. Villadsen}, @nospell{M. L. Michelsen},\n\ @cite{Solution of Differential Equation Models by Polynomial Approximation}.\n\ @end deftypefn") { int nargin = args.length (); if (nargin < 1 || nargin > 3) print_usage (); if (! args(0).is_scalar_type ()) error ("colloc: N must be a scalar"); double tmp = args(0).double_value (); if (xisnan (tmp)) error ("colloc: N cannot be NaN"); octave_idx_type ncol = NINTbig (tmp); if (ncol < 0) error ("colloc: N must be positive"); octave_idx_type ntot = ncol; octave_idx_type left = 0; octave_idx_type right = 0; for (int i = 1; i < nargin; i++) { std::string s = args(i).xstring_value ("colloc: optional arguments must be strings"); if ((s.length () == 1 && (s[0] == 'R' || s[0] == 'r')) || s == "right") right = 1; else if ((s.length () == 1 && (s[0] == 'L' || s[0] == 'l')) || s == "left") left = 1; else error ("colloc: string argument must be \"left\" or \"right\""); } ntot += left + right; if (ntot < 1) error ("colloc: the total number of roots must be positive"); CollocWt wts (ncol, left, right); ColumnVector r = wts.roots (); Matrix A = wts.first (); Matrix B = wts.second (); ColumnVector q = wts.quad_weights (); return ovl (r, A, B, q); }