--- a/day1/session3.tex	Wed Oct 21 12:34:03 2009 +0530
+++ b/day1/session3.tex	Wed Oct 21 16:57:28 2009 +0530
@@ -174,7 +174,7 @@
 \item Instead, we use arrays
 \end{itemize}
 \begin{lstlisting}
-In []: array(L)
+In []: L = array(L)
 In []: T = array(T)
 In []: Tsq = T*T
 In []: plot(L, Tsq, 'o')