--- a/day1/session1.tex	Sun Jan 10 18:29:20 2010 +0530
+++ b/day1/session1.tex	Sun Jan 10 22:36:09 2010 +0530
@@ -180,6 +180,7 @@
       \item \typ{pendulum.txt}
       \item \typ{points.txt}
       \item \typ{pos.txt}
+      \item \typ{holmes.txt}
       \end{itemize}
     \item Python scripts: 
       \begin{itemize}
@@ -189,6 +190,7 @@
     \item Images
       \begin{itemize}
       \item \typ{lena.png}
+      \item \typ{smoothing.gif}
       \end{itemize}
   \end{enumerate}
 \end{frame}
@@ -526,9 +528,18 @@
 
 \begin{frame}[fragile]
 \frametitle{\incqno }
+Draw (roughly) the plot obtained by the following:
+\begin{lstlisting}
+In []: x = linspace(0, 2*pi, 3)
+In []: plot(x, sin(x))
+\end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{\incqno }
 Describe the plot produced by the following:
 \begin{lstlisting}
-In []: x = linspace(0, 2*pi)
+In []: x = linspace(0, 2*pi, 50)
 In []: plot(x, cos(x), 'go')
 \end{lstlisting}
 \end{frame}
@@ -551,3 +562,15 @@
 What ipython magic command do you use to obtain the lines of code you have already typed in the interpreter? What command do you use to save them?
 \end{frame}
 
+\begin{frame}
+\frametitle{\incqno }
+The following code snippet has an error/bug:
+\begin{lstlisting}
+In []: y = linspace(0, 2*pi, 50)
+In []: plot(y, sin(y))
+In []: clf()
+In []: plot(y, cos(y))
+In []: legend(['sin(y)', 'cos(y)']) 
+\end{lstlisting}
+What is the error? How do you fix it?  
+\end{frame}