Mercurial > octave
view scripts/strings/str2num.m @ 31248:8b75954a4670
delaunayn: adjust node ordering for positive outward normal vectors (bug #53397)
* delaunayn.m: Check sign of simplex volume, flip node order for negative
volumes to ensure positive (outward-pointing) normal vectors. Add BISTs to
check for positive volumes.
* etc/News.8.md: Append function improvement note to delaunayn change
paragraph under General Improvements.
author | Nicholas R. Jankowski <jankowski.nicholas@gmail.com> |
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date | Thu, 29 Sep 2022 23:09:05 -0400 |
parents | 796f54d4ddbf |
children | 597f3ee61a48 |
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######################################################################## ## ## Copyright (C) 1996-2022 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/>. ## ######################################################################## ## -*- texinfo -*- ## @deftypefn {} {@var{x} =} str2num (@var{s}) ## @deftypefnx {} {[@var{x}, @var{state}] =} str2num (@var{s}) ## Convert the string (or character array) @var{s} to a number (or an array). ## ## Examples: ## ## @example ## @group ## str2num ("3.141596") ## @result{} 3.141596 ## ## str2num (["1, 2, 3"; "4, 5, 6"]) ## @result{} 1 2 3 ## 4 5 6 ## @end group ## @end example ## ## The optional second output, @var{state}, is logically true when the ## conversion is successful. If the conversion fails the numeric output, ## @var{x}, is empty and @var{state} is false. ## ## @strong{Caution:} As @code{str2num} uses the @code{eval} function to do the ## conversion, @code{str2num} will execute any code contained in the string ## @var{s}. Use @code{str2double} for a safer and faster conversion. ## ## For cell array of strings use @code{str2double}. ## @seealso{str2double, eval} ## @end deftypefn function [m, state] = str2num (s) if (nargin < 1) print_usage (); elseif (! ischar (s)) error ("str2num: S must be a string or string array"); endif s(:, end+1) = ";"; s = sprintf ("m = [%s];", reshape (s', 1, numel (s))); state = true; ## Swallow any errors from eval (bug #55939). try eval (s); catch m = []; state = false; end_try_catch if (ischar (m)) m = []; state = false; endif endfunction %!assert (str2num ("-1.3e2"), -130) %!assert (str2num ("[1, 2; 3, 4]"), [1, 2; 3, 4]) %!test %! [x, state] = str2num ("pi"); %! assert (state); %! [x, state] = str2num ("Hello World"); %! assert (! state); ## Test input validation %!error <Invalid call> str2num () %!error <S must be a string> str2num ({"string"})