1 ## Copyright (C) 2011 David Bateman
3 ## This program is free software; you can redistribute it and/or modify it under
4 ## the terms of the GNU General Public License as published by the Free Software
5 ## Foundation; either version 3 of the License, or (at your option) any later
8 ## This program is distributed in the hope that it will be useful, but WITHOUT
9 ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 ## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
13 ## You should have received a copy of the GNU General Public License along with
14 ## this program; if not, see <http://www.gnu.org/licenses/>.
17 ## @deftypefn {Loadable Function} {} diag (@var{v}, @var{k})
18 ## Return a diagonal matrix with Galois vector @var{v} on diagonal @var{k}.
19 ## The second argument is optional. If it is positive, the vector is placed on
20 ## the @var{k}-th super-diagonal. If it is negative, it is placed on the
21 ## @var{-k}-th sub-diagonal. The default value of @var{k} is 0, and the
22 ## vector is placed on the main diagonal. For example,
25 ## diag (gf([1, 2, 3],2), 1)
27 ## GF(2^2) array. Primitive Polynomial = D^2+D+1 (decimal 7)
38 function varargout = diag (varargin)
39 varargout = cell (1, max(1, nargout));
40 [varargout{:}] = gdiag (varargin{:});