/usr/share/octave/packages/linear-algebra-2.2.0/@kronprod/full.m is in octave-linear-algebra 2.2.0-1build1.
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 | ## Copyright (C) 2010 Soren Hauberg
##
## 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, 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 file. If not, see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Function File} full (@var{KP})
## Return the full matrix representation of the Kronecker product @var{KP}.
##
## If @var{KP} is the Kronecker product of an @var{n}-by-@var{m} matrix and a
## @var{q}-by-@var{r} matrix, then the result is a @var{n}@var{q}-by-@var{m}@var{r}
## matrix. Thus, the result can require vast amount of memory, so this function
## should be avoided whenever possible.
## @seealso{full, @@kronprod/sparse}
## @end deftypefn
function retval = full (KP)
if (nargin != 1)
print_usage ();
endif
if (!isa (KP, "kronprod"))
error ("full: input argument must be of class 'kronprod'");
endif
retval = full (kron (KP.A, KP.B));
if (!isempty (KP.P))
#retval = KP.P * retval * KP.P';
retval = retval (KP.P, KP.P);
endif
endfunction
|