1 ## Copyright (C) 2010 Soren Hauberg
3 ## This program is free software; you can redistribute it and/or modify
4 ## it under the terms of the GNU General Public License as published by
5 ## the Free Software Foundation; either version 3, or (at your option)
8 ## This program is distributed in the hope that it will be useful, but
9 ## WITHOUT ANY WARRANTY; without even the implied warranty of
10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 ## General Public License for more details.
13 ## You should have received a copy of the GNU General Public License
14 ## along with this file. If not, see <http://www.gnu.org/licenses/>.
17 ## @deftypefn {Function File} mpower (@var{KP}, @var{k})
18 ## XXX: Write documentation
21 function retval = mpower (KP, k)
28 error ("mpower: first input argument must be a matrix");
32 error ("mpower: second input argument must be a scalar");
35 ## Do the actual computation
36 if (issquare (KP.A) && issquare (KP.B) && k == round (k))
37 retval = kronprod (KP.A^k, KP.B^k);
38 elseif (issquare (KP))
39 ## XXX: Can we do something smarter here?
42 error ("for A^b, A must be square");