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comparison scripts/control/system/is_observable.m @ 7136:59dcf01bb3e3

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[project @ 2007-11-08 20:18:25 by jwe]
author jwe
date Thu, 08 Nov 2007 20:18:26 +0000
parents a1dbe9d80eee
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7135:8aa770b6c5bf 7136:59dcf01bb3e3
36 ## Created: August 1993 36 ## Created: August 1993
37 ## Updated by John Ingram (ingraje@eng.auburn.edu) July 1996. 37 ## Updated by John Ingram (ingraje@eng.auburn.edu) July 1996.
38 38
39 function [retval, U] = is_observable (a, c, tol) 39 function [retval, U] = is_observable (a, c, tol)
40 40
41 if( nargin < 1) 41 if (nargin < 1)
42 print_usage (); 42 print_usage ();
43 elseif(isstruct(a)) 43 elseif (isstruct (a))
44 ## system form 44 ## system form
45 if(nargin == 2) 45 if (nargin == 2)
46 tol = c; 46 tol = c;
47 elseif(nargin > 2) 47 elseif (nargin > 2)
48 print_usage (); 48 print_usage ();
49 endif 49 endif
50 [a,b,c] = sys2ss(a); 50 [a, b, c] = sys2ss (a);
51 elseif(nargin > 3) 51 elseif (nargin > 3)
52 print_usage (); 52 print_usage ();
53 endif 53 endif
54 if(exist("tol")) 54 if (exist ("tol"))
55 [retval,U] = is_controllable (a', c', tol); 55 [retval, U] = is_controllable (a', c', tol);
56 else 56 else
57 [retval,U] = is_controllable (a', c'); 57 [retval, U] = is_controllable (a', c');
58 endif 58 endif
59 59
60 endfunction 60 endfunction
61 61