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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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+## 02110-1301, USA.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {} pascal_pdf (@var{x}, @var{n}, @var{p})
+## For each element of @var{x}, compute the probability density function
+## (PDF) at @var{x} of the Pascal (negative binomial) distribution with
+## parameters @var{n} and @var{p}.
+##
+## The number of failures in a Bernoulli experiment with success
+## probability @var{p} before the @var{n}-th success follows this
+## distribution. 
+## @end deftypefn
+
+## Author: KH <Kurt.Hornik@wu-wien.ac.at>
+## Description: PDF of the Pascal (negative binomial) distribution
+
+function pdf = pascal_pdf (varargin)
+
+  pdf = nbinpdf (varargin{:});
+
+endfunction