Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / communications-1.1.1 / qfuncinv.m

diff --git a/octave_packages/communications-1.1.1/qfuncinv.m b/octave_packages/communications-1.1.1/qfuncinv.m
new file mode 100644 (file)
index 0000000..a0e0f8c
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+++ b/octave_packages/communications-1.1.1/qfuncinv.m
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+## Copyright (C) 2007 Sylvain Pelissier <sylvain.pelissier@gmail.com>
+##
+## This program 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.
+##
+## This program 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
+## this program; if not, see <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {[@var{y}] =} qfuncinv (@var{x})
+## Compute the inverse Q function.
+## @seealso{erfc,  erf}
+## @end deftypefn
+
+function y = qfuncinv(x)
+  if (nargin < 1); 
+    usage('qfuncinv(x)'); 
+  end
+  y = -norminv(x);
+endfunction