|
2313
|
1 ## Copyright (C) 1996 John W. Eaton |
|
|
2 ## |
|
|
3 ## This file is part of Octave. |
|
|
4 ## |
|
|
5 ## Octave is free software; you can redistribute it and/or modify it |
|
|
6 ## under the terms of the GNU General Public License as published by |
|
|
7 ## the Free Software Foundation; either version 2, or (at your option) |
|
|
8 ## any later version. |
|
|
9 ## |
|
|
10 ## Octave is distributed in the hope that it will be useful, but |
|
|
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
|
|
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
|
13 ## General Public License for more details. |
|
|
14 ## |
|
|
15 ## You should have received a copy of the GNU General Public License |
|
|
16 ## along with Octave; see the file COPYING. If not, write to the Free |
|
|
17 ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
|
|
18 ## 02111-1307, USA. |
|
2303
|
19 |
|
2311
|
20 ## usage: complement (a, b) |
|
|
21 ## |
|
|
22 ## Returns the elements of set b that are not in set a. |
|
|
23 ## |
|
|
24 ## See - create_set, union, intersection |
|
559
|
25 |
|
2311
|
26 function y = complement (a, b) |
|
559
|
27 |
|
904
|
28 if (nargin != 2) |
|
|
29 usage ("complement(a,b)"); |
|
559
|
30 endif |
|
|
31 |
|
904
|
32 if (isempty (a)) |
|
559
|
33 y = create_set(b); |
|
904
|
34 elseif (isempty (b)) |
|
559
|
35 y = []; |
|
|
36 else |
|
904
|
37 a = create_set (a); |
|
|
38 b = create_set (b); |
|
559
|
39 yindex = 1; |
|
904
|
40 y = zeros (1, length (b)); |
|
|
41 for index = 1:length (b) |
|
|
42 if (all (a != b (index))) |
|
559
|
43 y(yindex++) = b(index); |
|
|
44 endif |
|
|
45 endfor |
|
|
46 y = y(1:(yindex-1)); |
|
|
47 endif |
|
|
48 |
|
|
49 endfunction |
|
|
50 |
