|
3437
|
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} {} __tf2sysl__ (@var{vec}) |
|
3439
|
21 ## used internally in tf2sys. |
|
3437
|
22 ## strip leading zero coefficients to get the true polynomial length |
|
|
23 ## @end deftypefn |
|
|
24 |
|
3438
|
25 function vec = __tf2sysl__ (vec) |
|
3437
|
26 |
|
|
27 while( (length(vec) > 1) & (vec(1) == 0) ) |
|
|
28 vec = vec(2:length(vec)); |
|
|
29 endwhile |
|
|
30 |
|
|
31 if(vec(1) == 0) |
|
|
32 warning("tf2sys: polynomial has no nonzero coefficients!") |
|
|
33 endif |
|
|
34 |
|
|
35 endfunction |
