Added warnings about state space / transfer function conversion still being buggy.

Kevin Chen · Kevin Chen · commit e614fa7d0f35 · 2011-02-08T22:18:27.000Z
Kevin K. Chen &lt;kkchen@princeton.edu&gt;
diff --git a/src/TestConvert.py b/src/TestConvert.py
@@ -27,9 +27,9 @@ def setUp(self):
         # Number of times to run each of the randomized tests.
         self.numTests = 10
         # Maximum number of states to test + 1
-        self.maxStates = 2
+        self.maxStates = 3
         # Maximum number of inputs and outputs to test + 1
-        self.maxIO = 2
+        self.maxIO = 3
         # Set to True to print systems to the output.
         self.debug = True
 
diff --git a/src/statesp.py b/src/statesp.py
@@ -449,9 +449,9 @@ def _convertToStateSpace(sys, **kw):
         index = [len(den) - 1 for i in range(sys.outputs)]
         # Repeat the common denominator along the rows.
         den = array([den for i in range(sys.outputs)])
-        #print index
-        #print den
-        #print num
+        # TODO: transfer function to state space conversion is still buggy!
+        print "Warning: transfer function to state space conversion by td04ad \
+is still buggy!"
         ssout = td04ad(sys.inputs, sys.outputs, index, den, num)
     
         states = ssout[0]
diff --git a/src/xferfcn.py b/src/xferfcn.py
@@ -697,7 +697,10 @@ def _convertToTransferFunction(sys, **kw):
             raise TypeError("If sys is a StateSpace, _convertToTransferFunction \
 cannot take keywords.")
 
-        # Use Slycot to make the transformation.
+        # Use Slycot to make the transformation.  TODO: this is still somewhat
+        # buggy!
+        print "Warning: state space to transfer function conversion by tb04ad \
+is still buggy!"
         tfout = tb04ad(sys.states, sys.inputs, sys.outputs, sys.A, sys.B, sys.C,
             sys.D, sys.outputs, sys.outputs, sys.inputs)
 
