## 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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
## 02110-1301, USA.

## -*- texinfo -*-
## @deftypefn {Function File} {} gamma_inv (@var{x}, @var{a}, @var{b})
## For each component of @var{x}, compute the quantile (the inverse of
## the CDF) at @var{x} of the Gamma distribution with parameters @var{a}
## and @var{b}. 
## @end deftypefn

## Author: KH <Kurt.Hornik@wu-wien.ac.at>
## Description: Quantile function of the Gamma distribution

function inv = gamma_inv (varargin)

 if (nargin > 2)
   varargin{3} = 1 ./ varargin{3};
 endif

 inv =  gaminv (varargin{:});

endfunction