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annotate scripts/strings/str2num.m @ 11523:fd0a3ac60b0e

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update copyright notices
author John W. Eaton <jwe@octave.org>
date Fri, 14 Jan 2011 05:47:45 -0500
parents 58604c45ca74
children c792872f8942
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John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 1996-2011 Kurt Hornik
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {} str2num (@var{s})
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21 ## Convert the string (or character array) @var{s} to a number (or an
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22 ## array). Examples:
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23 ##
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24 ## @example
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25 ## @group
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26 ## str2num("3.141596")
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27 ## @result{} 3.141596
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28 ##
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29 ## str2num(["1, 2, 3"; "4, 5, 6"]);
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30 ## @result{} ans =
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31 ## 1 2 3
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32 ## 4 5 6
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33 ## @end group
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34 ## @end example
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35 ##
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36 ## @strong{Caution:} As @code{str2num} uses the @code{eval} function
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37 ## to do the conversion, @code{str2num} will execute any code contained
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38 ## in the string @var{s}. Use @code{str2double} instead if you want to
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39 ## avoid the use of @code{eval}.
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40 ## @seealso{str2double, eval}
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41 ## @end deftypefn
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42
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43 ## Author: jwe
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44
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45 function m = str2num (s)
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46
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47 if (nargin == 1 && ischar (s))
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48 [nr, nc] = size (s);
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49 sep = ";";
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50 sep = sep (ones (nr, 1), 1);
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51 s = sprintf ("m = [%s];", reshape ([s, sep]', 1, nr * (nc + 1)));
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52 eval (s, "m = [];");
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53 if (ischar (m))
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54 m = [];
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55 endif
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56 else
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57 print_usage ();
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58 endif
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59
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60 endfunction
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62 %!assert(str2num ("-1.3e2") == -130 && str2num ("[1, 2; 3, 4]") == [1, 2; 3, 4]);
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64 %!error str2num ();
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66 %!error str2num ("string", 1);
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