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maint: Update copyright notices for 2015.
author John W. Eaton <jwe@octave.org>
date Wed, 11 Feb 2015 14:19:08 -0500
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1 ## Copyright (C) 2008-2015 Jaroslav Hajek
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2 ## Copyright (C) 2009 VZLU Prague
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3 ##
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4 ## This file is part of Octave.
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5 ##
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6 ## Octave is free software; you can redistribute it and/or modify it
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7 ## under the terms of the GNU General Public License as published by
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8 ## the Free Software Foundation; either version 3 of the License, or (at
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9 ## your option) any later version.
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10 ##
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11 ## Octave is distributed in the hope that it will be useful, but
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12 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 ## General Public License for more details.
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15 ##
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16 ## You should have received a copy of the GNU General Public License
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17 ## along with Octave; see the file COPYING. If not, see
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18 ## <http://www.gnu.org/licenses/>.
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19
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20 ## -*- texinfo -*-
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21 ## @deftypefn {Function File} {} optimget (@var{options}, @var{parname})
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22 ## @deftypefnx {Function File} {} optimget (@var{options}, @var{parname}, @var{default})
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23 ## Return the specific option @var{parname} from the optimization options
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24 ## structure @var{options} created by @code{optimset}.
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25 ##
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26 ## If @var{parname} is not defined then return @var{default} if supplied,
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27 ## otherwise return an empty matrix.
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28 ## @seealso{optimset}
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29 ## @end deftypefn
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30
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31 function retval = optimget (options, parname, default)
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32
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33 if (nargin < 2 || nargin > 4 || ! isstruct (options) || ! ischar (parname))
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34 print_usage ();
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35 endif
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36
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37 ## Expand partial-length names into full names
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38 opts = __all_opts__ ();
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39 idx = strncmpi (opts, parname, length (parname));
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40 nmatch = sum (idx);
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41
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42 if (nmatch == 1)
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43 parname = opts{idx};
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44 elseif (nmatch == 0)
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45 warning ("optimget: unrecognized option: %s", parname);
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46 else
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47 fmt = sprintf ("optimget: ambiguous option: %%s (%s%%s)",
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48 repmat ("%s, ", 1, nmatch-1));
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49 warning (fmt, parname, opts{idx});
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50 endif
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51
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52 if (isfield (options, parname) && ! isempty (options.(parname)))
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53 retval = options.(parname);
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54 elseif (nargin > 2)
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55 retval = default;
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56 else
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57 retval = [];
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58 endif
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59
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60 endfunction
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61
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62
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63 %!shared opts
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64 %! opts = optimset ("tolx", 0.1, "maxit", 100);
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65 %!assert (optimget (opts, "TolX"), 0.1)
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66 %!assert (optimget (opts, "maxit"), 100)
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67 %!assert (optimget (opts, "MaxITer"), 100)
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68 %!assert (optimget (opts, "TolFun"), [])
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69 %!assert (optimget (opts, "TolFun", 1e-3), 1e-3)
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70
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71 %% Test input validation
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72 %!error optimget ()
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73 %!error optimget (1)
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74 %!error optimget (1,2,3,4,5)
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75 %!error optimget (1, "name")
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76 %!error optimget (struct (), 2)
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77 %!warning <unrecognized option: foobar> (optimget (opts, "foobar"));
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78 %!warning <ambiguous option: Max> (optimget (opts, "Max"));
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79