Mercurial > hg > octave-lojdl
changeset 3134:8bf70ba446d0
[project @ 1998-01-30 21:23:04 by jwe]
author | jwe |
---|---|
date | Fri, 30 Jan 1998 21:23:04 +0000 |
parents | 812645c63072 |
children | 267b3a5c6b28 |
files | scripts/specfun/betai.m |
diffstat | 1 files changed, 39 insertions(+), 0 deletions(-) [+] |
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new file mode 100644 --- /dev/null +++ b/scripts/specfun/betai.m @@ -0,0 +1,39 @@ +## Copyright (C) 1998 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, x) +## +## Compute the incomplete beta function +## +## betai (a, b, x) = beta(a,b)^(-1) \int_0^x t^(a-1) (1-t)^(b-1) dt +## +## The sizes of x, a, and b must agree. + +## Author: jwe +## Created: 30 Jan 1998 + +function retval = betai (a, b, x) + + if (nargin == 3) + retval = betainc (x, a, b); + else + usage ("betai (a, b, x)"); + endif + +endfunction