/usr/share/octave/packages/communications-1.2.1/egolaygen.m is in octave-communications-common 1.2.1-2.
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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 | ## Copyright (C) 2007 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} {[@var{G}, @var{P}] =} egolaygen ()
## Extended Golay code generator matrix.
##
## Returns @var{G}, the Extended Golay code (24,12) generator matrix,
## which can correct up to 3 errors. @var{P} is the parity
## check matrix, for this code.
##
## @seealso{egolaydec, egolayenc}
## @end deftypefn
function [G, P] = egolaygen ()
if (nargin != 0)
print_usage ();
endif
I = eye (12);
P = [1 0 0 0 1 1 1 0 1 1 0 1;
0 0 0 1 1 1 0 1 1 0 1 1;
0 0 1 1 1 0 1 1 0 1 0 1;
0 1 1 1 0 1 1 0 1 0 0 1;
1 1 1 0 1 1 0 1 0 0 0 1;
1 1 0 1 1 0 1 0 0 0 1 1;
1 0 1 1 0 1 0 0 0 1 1 1;
0 1 1 0 1 0 0 0 1 1 1 1;
1 1 0 1 0 0 0 1 1 1 0 1;
1 0 1 0 0 0 1 1 1 0 1 1;
0 1 0 0 0 1 1 1 0 1 1 1;
1 1 1 1 1 1 1 1 1 1 1 0;];
G = [P I]; # generator.
endfunction
%!test
%! g = egolaygen ();
%! assert (size (g), [12, 24])
%! assert (g(:,13:end), eye (12))
%! assert (sum (g(:,1:12)), [7*ones(1, 11), 11])
%% Test input validation
%!error egolaygen (1)
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