/usr/share/octave/packages/communications-1.1.1/vec2mat.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 | ## Copyright (C) 2001 Laurent Mazet
##
## 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{m} = } vec2mat (@var{v}, @var{c})
## @deftypefnx {Function File} {@var{m} = } vec2mat (@var{v}, @var{c}, @var{d})
## @deftypefnx {Function File} {[@var{m}, @var{add}] = } vec2mat (@dots{})
##
## Converts the vector @var{v} into a @var{c} column matrix with row priority
## arrangement and with the final column padded with the value @var{d} to the
## correct length. By default @var{d} is 0. The amount of padding added to
## the matrix is returned in @var{add}.
## @end deftypefn
## 2001-02-02
## initial release
function [M, d] = vec2mat (V, c, val)
switch (nargin)
case 1,
M = V;
return;
case 2,
val = 0;
case 3,
val = val;
otherwise
error ("usage: [M, add] = vec2mat (V, c [, d])");
endswitch
V = V.';
V = V(:);
r = ceil (length (V) / c);
d = r * c - length (V);
if (d != 0)
V = [ V ; val*ones(d, 1) ];
endif
M = reshape (V, c, r).';
endfunction
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