# HG changeset patch
# User jwe
# Date 745106024 0
# Node ID 8d4431f4a00a41c2f590b0b083d73014697b4f90
# Parent  3cccff82b7a63e5c94921b9289c14bf181c2c1e4
[project @ 1993-08-11 21:53:44 by jwe]

diff -r 3cccff82b7a6 -r 8d4431f4a00a scripts/control/lyap.m
--- a/scripts/control/lyap.m	Wed Aug 11 21:49:27 1993 +0000
+++ b/scripts/control/lyap.m	Wed Aug 11 21:53:44 1993 +0000
@@ -23,13 +23,11 @@
 # whichever is appropriate.
 
   if (nargin != 3 && nargin != 2)
-    error ("lyap: illegal number of arguments");
-    return;
+    error ("usage: lyap (a, b {,c})");
   endif
 
   if ((n = is_square(a)) == 0)
     error ("lyap: a is not square");
-    return;
   endif
 
   if (nargin == 2)
@@ -53,7 +51,6 @@
 
       if (m != n)
 	error ("lyap: a, b not conformably dimensioned");
-	return;
       endif
     endif
 
@@ -69,7 +66,6 @@
 
     if ((m = is_square (b)) == 0)
       error ("lyap: b must be square in a sylvester equation");
-      return;
     endif
 
     [n1,m1] = size(c);