|
3431
|
1 ## Copyright (C) 1996 Auburn University. All rights reserved. |
|
|
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 the |
|
|
7 ## Free Software Foundation; either version 2, or (at your option) any |
|
|
8 ## later version. |
|
|
9 ## |
|
|
10 ## Octave is distributed in the hope that it will be useful, but WITHOUT |
|
|
11 ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
|
|
12 ## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
|
|
13 ## 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 02111 USA. |
|
|
18 |
|
|
19 ## -*- texinfo -*- |
|
3500
|
20 ## @deftypefn {Function File} {} freqchkw (@var{w}) |
|
3438
|
21 ## Used by @code{__freqresp__} to check that input frequency vector @var{w} |
|
3431
|
22 ## is valid. |
|
|
23 ## Returns boolean value. |
|
|
24 ## @end deftypefn |
|
|
25 |
|
|
26 ## Author: A. S. Hodel <a.s.hodel@eng.auburn.edu> |
|
|
27 ## Created: July 1996 |
|
|
28 |
|
|
29 function USEW = freqchkw (w) |
|
|
30 |
|
4462
|
31 if (isempty (w)) |
|
3431
|
32 USEW = 0; |
|
4462
|
33 elseif (! isvector (w)) |
|
|
34 error ("w (%dx%d): must be [], a vector or a scalar", |
|
|
35 rows (w), columns (w)); |
|
|
36 elseif (max (abs (imag(w))) != 0 && min (real (w)) <= 0) |
|
|
37 error ("w must have real positive entries"); |
|
3431
|
38 else |
|
4462
|
39 w = sort (w); |
|
|
40 USEW = 1; ## vector provided (check values later) |
|
3431
|
41 endif |
|
|
42 |
|
|
43 endfunction |
