% -*- 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