Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / signal-1.1.3 / wrev.m

diff --git a/octave_packages/signal-1.1.3/wrev.m b/octave_packages/signal-1.1.3/wrev.m
new file mode 100644 (file)
index 0000000..bbc6004
--- /dev/null
+++ b/octave_packages/signal-1.1.3/wrev.m
@@ -0,0 +1,30 @@
+## Copyright (C) 2008 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}] =} wrev(@var{x})
+## Reverse the order of the element of the vector x.
+## @seealso{flipud, fliplr}
+## @end deftypefn
+
+function y = wrev(x)
+  if (nargin < 1|| nargin > 1); print_usage; end
+  if(~isvector(x))
+    error('x must be a vector');
+  end
+  l = length(x);
+  k = 0:l-1;
+  y = x(l-k);
+endfunction