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diff scripts/control/system/sysgettsam.m @ 7125:f084ba47812b

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[project @ 2007-11-08 02:29:23 by jwe]
author jwe
date Thu, 08 Nov 2007 02:29:24 +0000
parents a1dbe9d80eee
children
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line diff
--- a/scripts/control/system/sysgettsam.m
+++ b/scripts/control/system/sysgettsam.m
@@ -24,8 +24,12 @@
 
 function T = sysgettsam (sys)
 
+  if (nargin != 1)
+    print_usage ();
+  endif
+
   if (! isstruct (sys))
-    print_usage ();
+    error ("sysgettsam: expecting argument to be system structure");
   endif
 
   T = sys.tsam;