Add a useful package (from Source forge) for octave

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

diff --git a/octave_packages/communications-1.1.1/rledeco.m b/octave_packages/communications-1.1.1/rledeco.m
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+## Copyright (C) 2006 Muthiah Annamalai <muthiah.annamalai@uta.edu>
+##
+## 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} {} rledeco (@var{message})
+##
+## Returns decoded run-length @var{message}. 
+## The RLE encoded @var{message} has to be in the form of a 
+## row-vector. The message format (encoded RLE) is like  repetition 
+## [factor, value]+.
+##
+## An example use of @code{rledeco} is
+## @example
+## @group
+##          message=[1 5 2 4 3 1];
+##          rledeco(message) #gives
+##          ans = [    5   4   4   1   1   1]
+## @end group
+## @end example
+## @end deftypefn
+## @seealso{rledeco}
+
+function rmsg=rledeco(message)
+     if nargin < 1
+       error('Usage: rledeco(message)')
+     end
+     rmsg=[];
+     L=length(message);
+     itr=1;
+     while itr < L
+       times=message(itr);
+       val=message(itr+1);
+       rmsg=[rmsg val*(ones(1,times))];
+       itr=itr+2;
+     end
+     return
+end
+%!
+%!assert( rledeco([1 5 2 4 3 1]),[5 4 4 1 1 1])
+%!