diff -r 000000000000 -r 0efde00f9229 system/energy.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/system/energy.py	Fri May 27 14:24:59 2011 +0530
@@ -0,0 +1,10 @@
+#!/usr/bin/python
+
+from scipy import signal
+from scipy import linalg
+import scipy as sp
+
+u = sp.array([4,5,6])
+Eu = linalg.norm(u)**2
+ruu = signal.correlate(u,u)
+Eu = ruu[len(ruu)/2]