Mercurial > octave-nkf
view scripts/statistics/distributions/chi2pdf.m @ 11523:fd0a3ac60b0e
update copyright notices
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Fri, 14 Jan 2011 05:47:45 -0500 |
parents | 1740012184f9 |
children | 19b9f17d22af |
line wrap: on
line source
## Copyright (C) 1995-2011 Kurt Hornik ## ## This file is part of Octave. ## ## Octave 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. ## ## Octave 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 Octave; see the file COPYING. If not, see ## <http://www.gnu.org/licenses/>. ## -*- texinfo -*- ## @deftypefn {Function File} {} chi2pdf (@var{x}, @var{n}) ## For each element of @var{x}, compute the probability density function ## (PDF) at @var{x} of the chisquare distribution with @var{n} degrees ## of freedom. ## @end deftypefn ## Author: TT <Teresa.Twaroch@ci.tuwien.ac.at> ## Description: PDF of the chi-square distribution function pdf = chi2pdf (x, n) if (nargin != 2) print_usage (); endif if (!isscalar (n)) [retval, x, n] = common_size (x, n); if (retval > 0) error ("chi2pdf: X and N must be of common size or scalar"); endif endif pdf = gampdf (x, n / 2, 2); endfunction