--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Z-trans/respol3.py	Fri May 27 14:24:59 2011 +0530
@@ -0,0 +1,12 @@
+#!/usr/bin/python
+## 4.8
+
+from respol import respol
+
+import scipy as sp
+from scipy import signal
+
+num = sp.array([11,-15,6])
+den = signal.convolve([1,-2],signal.convolve([1,-1],[1,-1]))
+
+res, pol = respol(num,den)