/usr/share/octave/packages/3.2/optim-1.0.17/nonlin_curvefit.m is in octave-optim 1.0.17-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 | ## Copyright (C) 2010, 2011 Olaf Till <olaf.till@uni-jena.de>
##
## This program 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.
##
## This program 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 this program; If not, see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
##
## @deftypefn {Function File} {[@var{p}, @var{fy}, @var{cvg}, @var{outp}] =} nonlin_curvefit (@var{f}, @var{pin}, @var{x}, @var{y})
##
## @deftypefnx {Function File} {[@var{p}, @var{fy}, @var{cvg}, @var{outp}] =} nonlin_curvefit (@var{f}, @var{pin}, @var{x}, @var{y}, @var{settings})
##
## Frontend for nonlinear fitting of values, computed by a model
## function, to observed values.
##
## Please refer to the description of @code{nonlin_residmin}. The only
## differences to @code{nonlin_residmin} are the additional arguments
## @var{x} (independent values, mostly, but not necessarily, an array of
## the same dimensions or the same number of rows as @var{y}) and
## @var{y} (array of observations), the returned value @var{fy} (final
## guess for observed values) instead of @var{resid}, that the model
## function has a second obligatory argument which will be set to
## @var{x} and is supposed to return guesses for the observations (with
## the same dimensions), and that the possibly user-supplied function for the
## jacobian of the model function has also a second obligatory argument
## which will be set to @var{x}.
##
## @seealso {nonlin_residmin}
##
## @end deftypefn
function [p, fy, cvg, outp] = nonlin_curvefit (f, pin, x, y, settings)
if (nargin == 1)
p = __nonlin_residmin__ (f);
return;
endif
if (nargin < 4 || nargin > 5)
print_usage ();
endif
if (nargin == 4)
settings = struct ();
endif
if (compare_versions (version (), "3.3.55", "<"))
## optimset mechanism was fixed for option names with underscores
## sometime in 3.3.54+, if I remember right
optimget = @ __optimget__;
endif
if (! isempty (dfdp = optimget (settings, "dfdp")))
if (ischar (dfdp))
dfdp = str2func (dfdp);
endif
## settings = optimset \
## (settings, "dfdp", @ (p, varargin) dfdp (p, x, varargin{:}));
settings.dfdp = @ (p, varargin) dfdp (p, x, varargin{:});
endif
[p, fy, cvg, outp] = __nonlin_residmin__ \
(@ (p) f (p, x), pin, settings, struct ("observations", y));
fy += y;
endfunction
function ret = __optimget__ (s, name, default)
if (isfield (s, name))
ret = s.(name);
elseif (nargin > 2)
ret = default;
else
ret = [];
endif
endfunction
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