Mercurial > forge

comparison main/general/repmat.m @ 0:6b33357c7561 octave-forge

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Initial revision
author pkienzle
date Wed, 10 Oct 2001 19:54:49 +0000
parents
children acd3dcc6194b
comparison
equal deleted inserted replaced
-1:000000000000 0:6b33357c7561
1 ## Copyright (C) 2000 Paul Kienzle
2 ##
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 2 of the License, or
6 ## (at your option) any later version.
7 ##
8 ## This program is distributed in the hope that it will be useful,
9 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 ## GNU General Public License for more details.
12 ##
13 ## You should have received a copy of the GNU General Public License
14 ## along with this program; if not, write to the Free Software
15 ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16
17 ## -*- texinfo -*-
18 ## @deftypefn {Function File} {} repmat (@var{A}, @var{m}, @var{n})
19 ## @deftypefnx {Function File} {} repmat (@var{A}, [@var{m} @var{n}])
20 ## Form a block matrix of size @var{m} by @var{n}, with a copy of matrix
21 ## @var{A} as each element. If @var{n} is not specified, form an
22 ## @var{m} by @var{m} block matrix.
23 ## @end deftypefn
24
25 ## Author: Paul Kienzle <pkienzle@kienzle.powernet.co.uk>
26 ## Created: July 2000
27
28 ## 2001-06-27 Paul Kienzle <pkienzle@users.sf.net>
29 ## * cleaner, slightly faster code
30
31 function x = repmat (b, m, n)
32 if (nargin < 2 || nargin > 3)
33 usage ("repmat (a, m, n)");
34 endif
35
36 if nargin == 2
37 if is_scalar (m)
38 n = m;
39 elseif (is_vector (m) && length (m) == 2)
40 n = m (2);
41 m = m (1);
42 else
43 error ("repmat: only builds 2D matrices")
44 endif
45 endif
46
47 [rb, cb] = size (b);
48 if (isempty (b))
49 x = zeros (m*rb, n*cb);
50 else
51 x = b ([1:rb]' * ones(1,m), [1:cb]' * ones(1,n));
52 endif
53
54 endfunction