Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / nnet-0.1.13 / __randomisecols.m

diff --git a/octave_packages/nnet-0.1.13/__randomisecols.m b/octave_packages/nnet-0.1.13/__randomisecols.m
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+## Copyright (C) 2008 Michel D. Schmid  <michaelschmid@users.sourceforge.net>
+##
+##
+## 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 2, 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; see the file COPYING.  If not, see
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {} @var{retmatrix} = __randomisecols (@var{matrix})
+## @code{__randomisecols} takes a matrix as input argument and changes the order
+## of the columns. The rows aren't affected.
+## @end deftypefn
+
+## Author: mds
+
+function [retmatrix] = __randomisecols(matrix)
+
+  ## check number of inputs
+  error(nargchk(1,1,nargin));
+
+  # get number of cols
+  nCols = size(matrix,2);
+  
+  # now create random column order
+  colOrder = randperm(nCols);
+  
+  # now sort the matrix new
+  retmatrix = matrix(:,[colOrder]);
+
+
+endfunction
+
+%!# no test possible, contains randperm which is using
+%!# some randome functions