1 ## Copyright (C) 2000 Kai Habel
3 ## This program is free software; you can redistribute it and/or modify
4 ## it under the terms of the GNU General Public License as published by
5 ## the Free Software Foundation; either version 2 of the License, or
6 ## (at your option) any later version.
8 ## This program is distributed in the hope that it will be useful,
9 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 ## GNU General Public License for more details.
13 ## You should have received a copy of the GNU General Public License
14 ## along with this program; If not, see <http://www.gnu.org/licenses/>.
17 ## @deftypefn {Function File} @var{s}= std2 (@var{I})
18 ## Returns the standard deviation for a 2d real type matrix.
19 ## Uses @code{std (I(:))}
20 ## @seealso{mean2,std}
23 ## Author: Kai Habel <kai.habel@gmx.de>
32 if !(ismatrix(I) && isreal(I))
33 error("std2: argument must be a real type matrix");