Mercurial > octave
view scripts/specfun/beta.m @ 2312:204cc7db6f4a
[project @ 1996-07-11 21:20:36 by jwe]
author | jwe |
---|---|
date | Thu, 11 Jul 1996 21:20:36 +0000 |
parents | 2b5788792cad |
children | 5ca126254d15 |
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### Copyright (C) 1996 John W. Eaton ### ### 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. ## usage: beta (a, b) ## ## Returns the beta function beta(a,b) = gamma(a) * gamma(b) / gamma(a+b) ## of a and b. ## Author: KH <Kurt.Hornik@ci.tuwien.ac.at> ## Created: 13 June 1993 ## Adapted-By: jwe function retval = beta (a, b) if (nargin != 2) usage ("beta (a, b)"); endif retval = exp (lgamma (a) + lgamma (b) - lgamma (a+b)); endfunction