/usr/share/octave/packages/communications-1.1.1/helintrlv.m is in octave-communications-common 1.1.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 60 61 62 63 64 65 66 67 68 69 70 71 | ## Copyright (C) 2010 Mark Borgerding <mark@borgerding.net>
##
## 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{outdata} =} helintrlv (@var{data}, @var{col}, @var{ngrp},@var{stp})
## @var{col}-by-@var{ngrp}.
## @seealso{heldeintrlv}
## @end deftypefn
function [outdata,outstate] = helintrlv(data,col,ngrp,stp,init_state)
if (nargin < 4 ||nargin>5)
error('usage : interlvd = helintrlv(data,col,ngrp,stp)');
end
if(~isscalar(col) || ~isscalar(ngrp))
error("col and ngrp must be integers");
end
if( col ~= floor(col)|| ngrp ~= floor(ngrp))
error("col and ngrp must be integers");
end
didTranspose=0;
if ( isvector(data) && columns(data) > rows(data) )
data = data.';
didTranspose=1;
end
s = size(data);
if s(1) ~= col*ngrp
error("The length of data must be equals to ngrp*col");
end
if nargin==4
init_state = zeros(stp*col*(col-1)/2,s(2));
end
outstate =[];
# for each column
for k = 1:s(2)
tmp = reshape( data(:,k) , ngrp, col );
instate = init_state(:,k);
outstateCol=[];
for k1=2:col
curStepSize = (k1-1)*stp;
tmpCol= [instate(1:curStepSize) ;tmp(:,k1)];
tmp(:,k1) = tmpCol(1:ngrp);
outstateCol=[outstateCol;tmpCol(end+1-curStepSize:end)];
instate = instate(curStepSize+1:end);
end
outdata(:,k) = reshape(tmp.',s(1),1);
outstate = [outstate outstateCol];
end
if didTranspose
outdata = outdata.';
end
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