/usr/share/octave/packages/communications-1.2.1/rleenco.m is in octave-communications-common 1.2.1-2.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | ## 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} {} rleenco (@var{message})
##
## Returns run-length encoded @var{message}. The RLE form is built from
## @var{message}. The original @var{message} has to be in the form of a
## row-vector. The encoded @var{message} format (encoded RLE) is like
## [repetition factor]+, values.
##
## An example use of @code{rleenco} is
## @example
## @group
## message = [5 4 4 1 1 1]
## rleenco (message)
## @result{} [1 5 2 4 3 1];
## @end group
## @end example
## @seealso{rleenco}
## @end deftypefn
function rmsg = rleenco (message)
if (nargin != 1)
print_usage ();
endif
rmsg = [];
L = length (message);
itr = 1;
while (itr <= L)
times = 0;
val = message(itr);
while (itr <= L && message(itr) == val)
itr = itr + 1;
times = times + 1;
endwhile
rmsg = [rmsg times val];
endwhile
endfunction
%!assert (rleenco ([5 4 4 1 1 1]), [1 5 2 4 3 1])
%% Test input validation
%!error rleenco ()
%!error rleenco (1, 2)
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