Removed the system copying in hsvd.

Kevin Chen · Kevin Chen · commit 8781a8a4b661 · 2011-02-08T22:17:59.000Z
Kevin K. Chen &lt;kkchen@princeton.edu&gt;
diff --git a/src/modelsimp.py b/src/modelsimp.py
@@ -72,9 +72,8 @@ def hsvd(sys):
     >>> H = hsvd(sys)
 
     """
-    sys2 = StateSpace(sys.A,sys.B,sys.C,sys.D)
     Wc = gram(sys,'c')
-    Wo = gram(sys2,'o')
+    Wo = gram(sys,'o')
     WoWc = np.dot(Wo, Wc)
     w, v = np.linalg.eig(WoWc)
 
