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## Copyright (C) 1995-2013 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 3 of the License, 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, see
## <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Function File} {} probit (@var{p})
## For each component of @var{p}, return the probit (the quantile of the
## standard normal distribution) of @var{p}.
## @end deftypefn
## Written by KH <Kurt.Hornik@wu-wien.ac.at> on 1995/02/04
## Description: Probit transformation
function y = probit (p)
if (nargin != 1)
print_usage ();
endif
y = stdnormal_inv (p);
endfunction
%!assert (probit ([-1, 0, 0.5, 1, 2]), [NaN, -Inf, 0, Inf, NaN])
%% Test input validation
%!error probit ()
%!error probit (1, 2)
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