/usr/share/octave/packages/optim-1.3.0/fmins.m is in octave-optim 1.3.0-1.
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 | ## Copyright (C) 2003 Andy Adler <adler@ncf.ca>
##
## 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{x}] =} fmins(@var{f},@var{X0},@var{options},@var{grad},@var{P1},@var{P2}, ...)
##
## Find the minimum of a funtion of several variables.
## By default the method used is the Nelder&Mead Simplex algorithm
##
## Example usage:
## fmins(inline('(x(1)-5).^2+(x(2)-8).^4'),[0;0])
##
## @strong{Inputs}
## @table @var
## @item f
## A string containing the name of the function to minimize
## @item X0
## A vector of initial parameters fo the function @var{f}.
## @item options
## Vector with control parameters (not all parameters are used)
## @verbatim
## options(1) - Show progress (if 1, default is 0, no progress)
## options(2) - Relative size of simplex (default 1e-3)
## options(6) - Optimization algorithm
## if options(6)==0 - Nelder & Mead simplex (default)
## if options(6)==1 - Multidirectional search Method
## if options(6)==2 - Alternating Directions search
## options(5)
## if options(6)==0 && options(5)==0 - regular simplex
## if options(6)==0 && options(5)==1 - right-angled simplex
## Comment: the default is set to "right-angled simplex".
## this works better for me on a broad range of problems,
## although the default in nmsmax is "regular simplex"
## options(10) - Maximum number of function evaluations
## @end verbatim
## @item grad
## Unused (For compatibility with Matlab)
## @item P1,P2, ...
## Optional parameters for function @var{f}
##
## @end table
## @end deftypefn
function ret=fmins(funfun, X0, options, grad, varargin)
stopit = [1e-3, inf, inf, 1, 0, -1];
minfun = 'nmsmax';
if nargin < 3; options=[]; end
if length(options)>=1; stopit(5)= options(1); end
if length(options)>=2; stopit(1)= options(2); end
if length(options)>=5;
if options(6)==0; minfun= 'nmsmax';
if options(5)==0; stopit(4)= 0;
elseif options(5)==1; stopit(4)= 1;
else error('options(5): no associated simple strategy');
end
elseif options(6)==1; minfun= 'mdsmax';
elseif options(6)==2; minfun= 'adsmax';
else error('options(6) does not correspond to known algorithm');
end
end
if length(options)>=10; stopit(2)= options(10); end
ret = feval(minfun, funfun, X0, stopit, [], varargin{:});
endfunction
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