--- /dev/null
+## 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} size (@var{KP})
+## @deftypefnx{Function File} size (@var{KP}, @var{dim})
+## Return the size of the Kronecker product @var{KP} as a vector.
+## @seealso{size, @@kronprod/rows, @@kronprod/columns, @@kronprod/numel}
+## @end deftypefn
+
+function retval = size (KP, dim)
+ if (nargin < 1)
+ print_usage ();
+ endif
+
+ if (!isa (KP, "kronprod"))
+ error ("size: input must be of class 'kronprod'");
+ endif
+ if (nargin > 1 && !(isscalar (dim) && dim == round (dim) && dim > 0))
+ error ("size: optional second input must be a positive integer");
+ endif
+
+ retval = size (KP.A) .* size (KP.B);
+ if (nargin > 1)
+ retval = retval (dim);
+ endif
+endfunction