Mercurial > octave-nkf
annotate scripts/general/postpad.m @ 8433:3292bd1bbaa4
Cross reference between postpad and resize
author | Francesco Potortì <pot@gnu.org> |
---|---|
date | Fri, 26 Dec 2008 22:51:48 +0100 |
parents | a730e47fda4d |
children | faccdb98d953 |
rev | line source |
---|---|
7017 | 1 ## Copyright (C) 1994, 1995, 1996, 1997, 1998, 2000, 2002, 2004, 2005, |
2 ## 2006, 2007 John W. Eaton | |
2313 | 3 ## |
4 ## This file is part of Octave. | |
5 ## | |
6 ## Octave is free software; you can redistribute it and/or modify it | |
7 ## under the terms of the GNU General Public License as published by | |
7016 | 8 ## the Free Software Foundation; either version 3 of the License, or (at |
9 ## your option) any later version. | |
2313 | 10 ## |
11 ## Octave is distributed in the hope that it will be useful, but | |
12 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 ## General Public License for more details. | |
15 ## | |
16 ## You should have received a copy of the GNU General Public License | |
7016 | 17 ## along with Octave; see the file COPYING. If not, see |
18 ## <http://www.gnu.org/licenses/>. | |
2303 | 19 |
3458 | 20 ## -*- texinfo -*- |
3500 | 21 ## @deftypefn {Function File} {} postpad (@var{x}, @var{l}, @var{c}) |
8433
3292bd1bbaa4
Cross reference between postpad and resize
Francesco Potortì <pot@gnu.org>
parents:
7208
diff
changeset
|
22 ## @seealso{prepad, resize} |
3458 | 23 ## @end deftypefn |
3428 | 24 |
25 ## Author: Tony Richardson <arichard@stark.cc.oh.us> | |
26 ## Created: June 1994 | |
904 | 27 |
4862 | 28 function y = postpad (x, l, c, dim) |
29 | |
30 if (nargin < 2 || nargin > 4) | |
6046 | 31 print_usage (); |
4862 | 32 endif |
33 | |
34 if (nargin < 3 || isempty (c)) | |
35 c = 0; | |
36 else | |
37 if (! isscalar (c)) | |
38 error ("postpad: third argument must be empty or a scalar"); | |
39 endif | |
40 endif | |
561 | 41 |
4862 | 42 nd = ndims (x); |
43 sz = size (x); | |
44 if (nargin < 4) | |
45 %% Find the first non-singleton dimension | |
46 dim = 1; | |
47 while (dim < nd + 1 && sz (dim) == 1) | |
48 dim = dim + 1; | |
49 endwhile | |
50 if (dim > nd) | |
51 dim = 1; | |
52 endif | |
53 else | |
54 if (! (isscalar (dim) && dim == round (dim)) && dim > 0 && | |
55 dim < (nd + 1)) | |
56 error ("postpad: dim must be an integer and valid dimension"); | |
57 endif | |
561 | 58 endif |
59 | |
5459 | 60 if (! isscalar (l) || l < 0) |
4862 | 61 error ("second argument must be a positive scaler"); |
561 | 62 endif |
63 | |
5459 | 64 if (dim > nd) |
65 sz(nd+1:dim) = 1; | |
66 endif | |
67 | |
4862 | 68 d = sz (dim); |
5459 | 69 |
4862 | 70 if (d >= l) |
71 idx = cell (); | |
72 for i = 1:nd | |
7208 | 73 idx{i} = 1:sz(i); |
4862 | 74 endfor |
7208 | 75 idx{dim} = 1:l; |
76 y = x(idx{:}); | |
561 | 77 else |
4862 | 78 sz (dim) = l - d; |
79 y = cat (dim, x, c * ones (sz)); | |
561 | 80 endif |
81 | |
82 endfunction |