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annotate scripts/optimization/optimset.m @ 10635:d1978e7364ad

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Print name of function in error() string messages.
author Rik <octave@nomad.inbox5.com>
date Sun, 16 May 2010 22:26:54 -0700
parents eb63fbe60fab
children be55736a0783
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rev   line source
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John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 2007, 2008 John W. Eaton
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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} {} optimset ()
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22 ## @deftypefnx {Function File} {} optimset (@var{par}, @var{val}, @dots{})
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23 ## @deftypefnx {Function File} {} optimset (@var{old}, @var{par}, @var{val}, @dots{})
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24 ## @deftypefnx {Function File} {} optimset (@var{old}, @var{new})
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25 ## Create options struct for optimization functions.
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26 ## @end deftypefn
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27
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28 function retval = optimset (varargin)
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29
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30 nargs = nargin ();
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31
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32 ## Add more as needed.
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33 opts = __all_opts__ ();
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34
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35 if (nargs == 0)
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36 if (nargout == 0)
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37 ## Display possibilities.
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38 puts ("\nAll possible optimization options:\n\n");
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39 printf (" %s\n", opts{:});
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40 puts ("\n");
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41 else
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42 ## Return empty structure.
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43 ## We're incompatible with Matlab at this point.
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44 retval = struct ();
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45 endif
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46 elseif (nargs == 1 && ischar (varargin{1}))
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47 ## Return defaults for named function.
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48 fcn = varargin{1};
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49 try
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50 retval = feval (fcn, 'defaults');
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51 catch
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52 error ("optimset: no defaults for function `%s'", fcn);
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53 end_try_catch
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54 elseif (nargs == 2 && isstruct (varargin{1}) && isstruct (varargin{2}))
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55 ## Set slots in old from nonempties in new. Should we be checking
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56 ## to ensure that the field names are expected?
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57 old = varargin{1};
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58 new = varargin{2};
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59 fnames = fieldnames (old);
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60 ## skip validation if we're in the internal query
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61 validation = ! isempty (opts);
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62 for [val, key] = new
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63 if (validation)
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64 ## Case insensitive lookup in all options.
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65 i = lookup (opts, key, "i");
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66 ## Validate option.
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67 if (i > 0 && strcmpi (opts{i}, key))
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68 ## Use correct case.
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69 key = opts{i};
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70 else
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71 warning ("unrecognized option: %s", key);
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72 endif
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73 endif
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74 old.(key) = val;
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75 endfor
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76 retval = old;
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77 elseif (rem (nargs, 2) && isstruct (varargin{1}))
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78 ## Set values in old from name/value pairs.
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79 retval = optimset (varargin{1}, struct (varargin{2:end}));
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80 elseif (rem (nargs, 2) == 0)
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81 ## Create struct. Default values are replaced by those specified by
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82 ## name/value pairs.
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83 retval = optimset (struct (), struct (varargin{:}));
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84 else
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85 print_usage ();
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86 endif
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87
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88 endfunction
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89
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90 %!assert (optimget (optimset ('tolx', 1e-2), 'tOLx'), 1e-2)
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91 %!assert (isfield (optimset ('tolFun', 1e-3), 'TolFun'))