[python-control-discuss] SF.net SVN: python-control:[99] branches/control-0.4a/src/statefbk.py

[<kk...@us...>]

Revision: 99
          http://python-control.svn.sourceforge.net/python-control/?rev=99&view=rev
Author:   kkchen
Date:     2011-02-08 22:17:55 +0000 (Tue, 08 Feb 2011)

Log Message:
-----------
Implemented deep copy of A in gram.  This is a temporary solution.

Kevin K. Chen <kk...@pr...>

Modified Paths:
--------------
    branches/control-0.4a/src/statefbk.py

Modified: branches/control-0.4a/src/statefbk.py
===================================================================
--- branches/control-0.4a/src/statefbk.py	2011-02-08 22:17:51 UTC (rev 98)
+++ branches/control-0.4a/src/statefbk.py	2011-02-08 22:17:55 UTC (rev 99)
@@ -266,6 +266,9 @@
     >>> Wo = gram(sys,'o')
 
     """
+
+    from copy import deepcopy
+
     #Check for ss system object, need a utility for this?
 
     #TODO: Check for continous or discrete, only continuous supported right now
@@ -299,7 +302,8 @@
         raise ControlSlycot("can't find slycot module 'sb03md'")
     n = sys.states
     U = np.zeros((n,n))
-    out = sb03md(n, C, sys.A, U, dico, 'X', 'N', trana)
+    A = deepcopy(sys.A)
+    out = sb03md(n, C, A, U, dico, 'X', 'N', trana)
     gram = out[0]
     return gram
 


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