Mercurial > octave-nkf
view scripts/statistics/distributions/chisquare_cdf.m @ 4960:ce01dbd7e026 ss-2-1-58
[project @ 2004-09-02 03:47:49 by jwe]
author | jwe |
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date | Thu, 02 Sep 2004 03:47:49 +0000 |
parents | 4b0f3b055331 |
children | 4c8a2e4e0717 |
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## Copyright (C) 1995, 1996, 1997 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 2, 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, write to the Free ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA ## 02111-1307, USA. ## -*- texinfo -*- ## @deftypefn {Function File} {} chisquare_cdf (@var{x}, @var{n}) ## For each element of @var{x}, compute the cumulative distribution ## function (CDF) at @var{x} of the chisquare distribution with @var{n} ## degrees of freedom. ## @end deftypefn ## Author: TT <Teresa.Twaroch@ci.tuwien.ac.at> ## Description: CDF of the chi-square distribution function cdf = chisquare_cdf (x, n) if (nargin != 2) usage ("chisquare_cdf (x, n)"); endif if (!isscalar (n)) [retval, x, n] = common_size (x, n); if (retval > 0) error ("chisquare_cdf: x and n must be of common size or scalar"); endif endif cdf = gamma_cdf (x, n / 2, 1 / 2); endfunction