Branches merged.
authorSantosh G. Vattam <vattam.santosh@gmail.com>
Tue, 02 Mar 2010 10:55:49 +0530
changeset 374 0ba81871dae5
parent 373 f04eca8b2f3d (diff)
parent 370 b54a496d320c (current diff)
child 375 30124fd5eb7e
Branches merged.
day1/session1.tex
day1/tot.tex
--- a/day1/day1quiz1.tex	Thu Feb 04 23:15:50 2010 +0530
+++ b/day1/day1quiz1.tex	Tue Mar 02 10:55:49 2010 +0530
@@ -58,24 +58,25 @@
   \end{itemize}
 \end{frame}
 
+%% \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 }
-Draw (roughly) the plot obtained by the following:
+Describe the plot produced by the following:
 \begin{lstlisting}
-In []: x = linspace(0, 2*pi, 3)
-In []: plot(x, sin(x))
+In []: x = linspace(0, 2*pi, 50)
+In []: plot(x, cos(x), 'go')
 \end{lstlisting}
+Note: Do not draw it, just describe the plot
 \end{frame}
 
-%% \begin{frame}[fragile]
-%% \frametitle{\incqno }
-%% Describe the plot produced by the following:
-%% \begin{lstlisting}
-%% In []: x = linspace(0, 2*pi, 50)
-%% In []: plot(x, cos(x), 'go')
-%% \end{lstlisting}
-%% \end{frame}
-
 \begin{frame}
 \frametitle{\incqno }
 How will you plot the previous graph with line width set to 3?  How will
@@ -94,18 +95,18 @@
 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}[fragile]
-\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}
+%% \begin{frame}[fragile]
+%% \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}
 
 \begin{frame}[fragile]
 \frametitle{\incqno }
@@ -134,15 +135,15 @@
 Write the code to read a file \texttt{data.txt} and print each line of it?
 \end{frame}
 
-\begin{frame}[fragile]
-\frametitle{\incqno }
-What would be the result of the following code snippet:
-\begin{lstlisting}
-In []: x = linspace(0, 10, 50)
-In []: y = linspace(50, 100, 100)
-In []: plot(x, y)
-\end{lstlisting}
-\end{frame}
+%% \begin{frame}[fragile]
+%% \frametitle{\incqno }
+%% What would be the result of the following code snippet:
+%% \begin{lstlisting}
+%% In []: x = linspace(0, 10, 50)
+%% In []: y = linspace(50, 100, 100)
+%% In []: plot(x, y)
+%% \end{lstlisting}
+%% \end{frame}
 
 \begin{frame}[fragile]
 \frametitle{\incqno }
@@ -211,7 +212,7 @@
 \frametitle{\incqno }
 \begin{lstlisting}
 In []: marks = [10, 20, 30, 50, 55, 
-               75, 83] 
+                75, 83] 
 \end{lstlisting}
 How will you convert the list \texttt{marks} to an \alert{array}?
 \end{frame}
--- a/day1/day1quiz2.tex	Thu Feb 04 23:15:50 2010 +0530
+++ b/day1/day1quiz2.tex	Tue Mar 02 10:55:49 2010 +0530
@@ -35,7 +35,7 @@
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % Title page
-\title[Basic Python]{Python for science and engineering: Day 1, Quiz 2}
+\title[Basic Python]{Python for science and engineering: Day 2, Quiz 1}
 
 \author[FOSSEE Team] {FOSSEE}
 
--- a/day1/session1.tex	Thu Feb 04 23:15:50 2010 +0530
+++ b/day1/session1.tex	Tue Mar 02 10:55:49 2010 +0530
@@ -77,7 +77,7 @@
 \author[FOSSEE] {FOSSEE}
 
 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
-\date[] {11 January, 2010\\Day 1, Session 1}
+\date[] {12 February, 2010\\Day 1, Session 1}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 %\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo}
@@ -125,55 +125,41 @@
 \begin{frame}
   \frametitle{Workshop Schedule: Day 1}
   \begin{description}
-	\item[Session 1] Mon 09:00--10:00
-	\item[Session 2] Mon 10:05--11:05
-	\item[Session 3] Mon 11:20--12:20
-	\item[Session 4] Mon 12:25--13:25
-        \item[Quiz 1] Mon 14:25--14:40
-        \item[Exercises] Mon 14:40--15:25
-        \item[Session 5] Mon 15:40--16:40
-        \item[Quiz 2] Mon 16:45--17:00
+	\item[Session 1] Fri 14:00--15:00
+	\item[Session 2] Fri 15:05--16:05
+	\item[Session 3] Fri 16:10--17:10
+        \item[Quiz 1] Fri 17:10--17:25
+        \item[Exercises] Thu 17:30--18:00
   \end{description}
 \end{frame}
 
 \begin{frame}
   \frametitle{Workshop Schedule: Day 2}
   \begin{description}
-	\item[Session 1] Tue 09:00--10:00
-	\item[Session 2] Tue 10:05--11:05
-	\item[Session 3] Tue 11:20--12:20
-	\item[Session 4] Tue 12:25--13:25
-        \item[Quiz 1]  Tue 14:25--14:40
-        \item[Exercises] Tue 14:40--15:25
-        \item[Session 5] Tue 15:40--16:40
-        \item[Quiz 2]  Tue 16:45--17:00
+	\item[Session 1] Sat 09:00--10:00
+	\item[Session 2] Sat 10:05--11:05
+	\item[Session 3] Sat 11:20--12:20
+        \item[Quiz 2]  Fri 14:25--14:40
   \end{description}
 \end{frame}
 
 \begin{frame}
-  \frametitle{About the Workshop}
-  \begin{block}{Intended Audience}
-  \begin{itemize}
-       \item Engg., Mathematics and Science teachers.
-       \item Interested students from similar streams.
-  \end{itemize}
-  \end{block}  
-
-  \begin{block}{Goal: Successful participants will be able to}
-    \begin{itemize}
-      \item Use Python as plotting, computational tool.
-      \item Understand how to use Python as a scripting and problem solving language.
-      \item Train students for the same.
-    \end{itemize}
-  \end{block}
+  \frametitle{Workshop Schedule: Day 3}
+  \begin{description}
+        \item[Session 1] Sun 09:00--10:00
+        \item[Session 2] Sun 10:05--11:05
+        \item[Session 3] Sun 11:20--12:20
+        \item[Quiz 3] Sun 12:20--12:30
+        \item[Exercises] Sun 12:30--13:00
+  \end{description}
 \end{frame}
 
-\section{Getting started}
+\section{Checklist}
 \begin{frame}
 \frametitle{Checklist}
   \begin{enumerate}
     \item IPython
-    \item Editor: We recommend \alert{scite}.
+    \item Editor
     \item Data files: 
       \begin{itemize}
       \item \typ{sslc1.txt}
@@ -195,6 +181,25 @@
   \end{enumerate}
 \end{frame}
 
+\begin{frame}
+  \frametitle{About the Workshop}
+  \begin{block}{Intended Audience}
+  \begin{itemize}
+       \item Engg., Mathematics and Science teachers.
+       \item Interested students from similar streams.
+  \end{itemize}
+  \end{block}  
+
+  \begin{block}{Goal: Successful participants will be able to}
+    \begin{itemize}
+      \item Use Python as plotting, computational tool.
+      \item Understand how to use Python as a scripting and problem solving language.
+      \item Train students for the same.
+    \end{itemize}
+  \end{block}
+\end{frame}
+
+\section{Starting up Ipython}
 \begin{frame}[fragile]
 \frametitle{Starting up \ldots}
 \begin{block}{}
@@ -207,7 +212,7 @@
   Hello, World!
 \end{lstlisting}
 Exiting
-\begin{lstlisting}     
+\begin{lstlisting}
   In []: ^D(Ctrl-D)
   Do you really want to exit([y]/n)? y
 \end{lstlisting}
@@ -235,23 +240,22 @@
 \alert{IPython provides many additional features}\\
 \end{frame}
 
-%% \begin{frame}[fragile]
-%% \frametitle{Loops}
-%% Breaking out of loops
-%% \begin{lstlisting}     
-%%   In []: while True:
-%%     ...:     print "Hello, World!"
-%%     ...:     
-%%   Hello, World!
-%%   Hello, World!^C(Ctrl-C)
-%%   ------------------------------------
-%%   KeyboardInterrupt                   
-
-%% \end{lstlisting}
-%% \end{frame}
+\section{Loops}
+\begin{frame}[fragile]
+\frametitle{Loops}
+Breaking out of loops
+\begin{lstlisting}     
+  In []: while True:
+    ...:     print "Hello, World!"
+    ...:     
+  Hello, World!
+  Hello, World!^C(Ctrl-C)
+  ------------------------------------
+  KeyboardInterrupt                   
+\end{lstlisting}
+\end{frame}
 
 \section{Plotting}
-
 \subsection{Drawing plots}
 \begin{frame}[fragile]
 \frametitle{First Plot}
@@ -271,7 +275,6 @@
 \end{columns}
 \end{frame}
 
-
 \begin{frame}[fragile]
 \frametitle{Walkthrough}
 \begin{block}{\typ{x = linspace(start, stop, num)} }
@@ -413,8 +416,10 @@
 In []: plot(y, sin(y))
 In []: figure(2)
 In []: plot(y, cos(y))
+In []: savefig('cosine.png')
 In []: figure(1)
 In []: title('sin(y)')
+In []: savefig('sine.png')
 In []: close()
 In []: close()
 \end{lstlisting}
@@ -424,10 +429,10 @@
 \frametitle{Showing it better}
 \vspace{-0.15in}
 \begin{lstlisting}
-In []: plot(y, sin(y), 'g')
+In []: plot(y, cos(y), 'r')
 
 In []: clf()
-In []: plot(y, cos(y), 'r', linewidth=2)
+In []: plot(y, sin(y), 'g', linewidth=2)
 \end{lstlisting}
 \vspace*{-0.2in}
 \begin{center}
@@ -457,8 +462,7 @@
   \end{lstlisting}
 \emphbar{Set the axes limits}
   \begin{lstlisting}
-In []: xmax = 2*pi
-In []: xlim(xmin, xmax) 
+In []: xlim(xmin, 2*pi) 
 In []: ylim(ymin-0.2, ymax+0.2) 
   \end{lstlisting}
 \end{frame}
@@ -512,7 +516,7 @@
 \begin{itemize}
 \item Use \typ{\%hist} command of IPython 
 \item Identify the required line numbers
-\item Then, use \typ{\%save} command of IPython
+\item Then, use \typ{\%save} command of IPython 
 \end{itemize}
 \typ{In []: \%hist}\\
 \typ{In []: \%save four_plot.py} \alert{\typ{16 18-27}} 
@@ -533,8 +537,9 @@
 \begin{frame}[fragile]
   \frametitle{What did we learn?}
   \begin{itemize}
-    \item \kwrd{\%hist}
-    \item Saving commands to a script
+    \item Starting up IPython
+    \item \kwrd{\%hist} - History of commands
+    \item \kwrd{\%save} - Saving commands 
     \item Running a script using \kwrd{\%run -i}
     \item Creating simple plots.
     \item Adding labels and legends.
--- a/day1/session2.tex	Thu Feb 04 23:15:50 2010 +0530
+++ b/day1/session2.tex	Tue Mar 02 10:55:49 2010 +0530
@@ -78,7 +78,7 @@
 \author[FOSSEE] {FOSSEE}
 
 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
-\date[] {11 January, 2010\\Day 1, Session 2}
+\date[] {12 February, 2010\\Day 1, Session 2}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 %\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo}
@@ -179,10 +179,10 @@
 \begin{frame}[fragile]
 \frametitle{Additional Plotting Attributes}
 \begin{itemize}
-  \item \typ{'o'} - Filled circles
-  \item \typ{'.'} - Small Dots
-  \item \typ{'-'} - Lines
-  \item \typ{'--'} - Dashed lines
+  \item \kwrd{'o'} - Filled circles
+  \item \kwrd{'.'} - Small Dots
+  \item \kwrd{'-'} - Lines
+  \item \kwrd{'- -'} - Dashed lines
 \end{itemize}
 \end{frame}
 
@@ -190,7 +190,7 @@
 \begin{frame}[fragile]
   \frametitle{Lists: Introduction}
   \begin{lstlisting}
-    In []: x = [4, 2, 1, 3]
+    In []: x = [0, 1, 2, 3]
 
     In []: y = [7, 11, 15, 19]
 
@@ -208,43 +208,45 @@
 \end{lstlisting}
 \emphbar{Empty List}
 \begin{lstlisting}
-In []: a = [ 5, 2, 3, 1, 4] 
+In []: p = [ 2, 3, 5, 7] 
 
-In []: a[0]+a[1]+a[-1]
-Out[]: 11
+In []: p[0]+p[1]+p[-1]
+Out[]: 12
 \end{lstlisting}
 \end{frame}
 
 \begin{frame}[fragile]
   \frametitle{List: Slicing}
   \begin{block}{Remember\ldots}
-	\kwrd{In []: a = [ 5, 2, 3, 1, 4]}
+	\kwrd{In []: p = [ 2, 3, 5, 7]}
   \end{block}
 \begin{lstlisting}
-In []: a[1:3]
-Out[]: [2, 3]
+In []: p[1:3]
+Out[]: [3, 5]
 \end{lstlisting}
 \emphbar{A slice}
 \begin{lstlisting}
-In []: a[1:-1]
-Out[]: [2, 3, 1]
+In []: p[0:-1]
+Out[]: [2, 3, 5]
+In []: p[::2]
+Out[]: [2, 5]
 \end{lstlisting}
-\alert{\typ{list[initial:final]}}
+\alert{\typ{list[initial:final:step]}}
 \end{frame}
 
 %% more on list slicing
 \begin{frame}[fragile]
 \frametitle{List operations}
 \begin{lstlisting}
-In []: b = [ 8, 6, 9, 9]
-In []: c = a + b
+In []: b = [ 11, 13, 17]
+In []: c = p + b
 
 In []: c
-Out[]: [5, 2, 3, 1, 4, 8, 6, 9, 9]
+Out[]: [2, 3, 5, 7, 11, 13, 17]
 
-In []: a.append(6)
-In []: a
-Out[]: [5, 2, 3, 1, 4, 6]
+In []: p.append(11)
+In []: p
+Out[]: [ 2, 3, 5, 7, 11]
 \end{lstlisting}
 %\inctime{10}
 \end{frame}
@@ -299,27 +301,40 @@
 \begin{lstlisting}
 In []: tsq = []
 
+In []: len(l)
+Out[]: 9
+
+In []: len(t)
+Out[]: 9
+
 In []: for time in t:
  ....:     tsq.append(time*time)
  ....:
  ....:
+
+In []: plot(l, tsq)
+Out[]: [<matplotlib.lines.Line2D object at 0xa5b05ac>]
 \end{lstlisting}
-Hit the ``ENTER'' key twice to come to the previous indentation level
-\begin{lstlisting}
-In []: print tsq
-\end{lstlisting}
-\kwrd{tsq} is the list of squares of \typ{t} values.
+This gives \kwrd{tsq} which is the list of squares of \typ{t} values.
 \end{frame}
 
 \begin{frame}[fragile]
-\frametitle{Plotting $L$ vs $T^2$ \ldots}
-\begin{lstlisting}
-In []: plot(l, tsq)
-Out[]: [<matplotlib.lines.Line2D object at 0xa5b05ac>]
-\end{lstlisting}
-This gives the required plot. 
+  \frametitle{How to come out of the \texttt{for} loop?}
+  Hitting the ``ENTER'' key twice returns the cursor to the previous indentation level
+  \begin{lstlisting}
+    In []: for time in t:
+     ....:     tsq.append(time*time)
+     ....:     
+     ....:     
+
+    In []: print tsq, len(tsq)
+    In []: plot(l, tsq)
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
 \begin{figure}
-\includegraphics[width=2.2in]{data/L-TSq-limited.png}
+\includegraphics[width=3.5in]{data/L-TSq-limited.png}
 \end{figure}
 \end{frame}
 
@@ -353,7 +368,7 @@
 
 \begin{frame}[fragile]
 \frametitle{Plotting from \typ{pendulum.txt}}
-Type the following in an editor. Save as \typ{pend\_pl.py}
+Open a new script and type the following:
 \begin{lstlisting}
 l = []
 t = []
@@ -365,15 +380,14 @@
 for time in t:
     tsq.append(time*time)
 plot(l, tsq, '.')
-show()
 \end{lstlisting}
 \end{frame}
 
 \begin{frame}
 \frametitle{Save and run}
 \begin{itemize}
-  \item Save as \typ{pend\_pl.py}
-  \item Run using \kwrd{\%run -i pend\_pl.py}
+  \item Save as pendulum\_plot.py.
+  \item Run using \kwrd{\%run -i pendulum\_plot.py}
 \end{itemize}
 \end{frame}
 
@@ -452,7 +466,6 @@
 for time in t:
     tsq.append(time*time)
 plot(l, tsq, '.')
-show()
 \end{lstlisting}
 \end{frame}
 
--- a/day1/session3.tex	Thu Feb 04 23:15:50 2010 +0530
+++ b/day1/session3.tex	Tue Mar 02 10:55:49 2010 +0530
@@ -79,7 +79,7 @@
 
 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
 
-\date[] {11 January, 2010\\Day 1, Session 3}
+\date[] {12 February, 2010\\Day 1, Session 3}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 %\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo}
@@ -319,7 +319,7 @@
   \end{lstlisting}
 \begin{itemize}
     \item Keys will be region codes
-    \item Values will be the number students who scored more than 90\% in that region
+    \item Values will be the number students who scored more than 90\% in that region in Science
   \end{itemize}
   \begin{block}{Sample \emph{science} dictionary}
     \{'A': 729, 'C': 764, 'B': 1120,'E': 414, 'D': 603, 'F': 500\}
--- a/day1/session4.tex	Thu Feb 04 23:15:50 2010 +0530
+++ b/day1/session4.tex	Tue Mar 02 10:55:49 2010 +0530
@@ -79,7 +79,7 @@
 \author[FOSSEE] {FOSSEE}
 
 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
-\date[] {11 January, 2010\\Day 1, Session 4}
+\date[] {13 February, 2010\\Day 2, Session 1}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 %\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo}
@@ -279,6 +279,21 @@
 \end{frame}
 
 \begin{frame}[fragile]
+  \frametitle{Shape of a matrix}
+  \begin{lstlisting}
+In []: c
+Out[]: 
+array([[11, 12, 13],
+       [ 0,  0,  0],
+       [31, 32, 33]])
+
+In []: c.shape
+Out[]: (3, 3)
+  \end{lstlisting}
+\emphbar{Shape specifies shape or dimensions of a matrix}
+\end{frame}
+
+\begin{frame}[fragile]
   \frametitle{Slicing \& Striding Exercises}
 \begin{small}
   \begin{lstlisting}
@@ -518,7 +533,7 @@
 
 \begin{frame}[fragile]
 \frametitle{Getting $L$ and $T^2$}
-If you \alert{closed} IPython after session 2
+%If you \alert{closed} IPython after session 2
 \begin{lstlisting}
 In []: l = []
 In []: t = []
--- a/day1/session5.tex	Thu Feb 04 23:15:50 2010 +0530
+++ b/day1/session5.tex	Tue Mar 02 10:55:49 2010 +0530
@@ -78,7 +78,7 @@
 \author[FOSSEE] {FOSSEE}
 
 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
-\date[] {11 January, 2010\\Day 1, Session 5}
+\date[] {12 February, 2010\\Day 1, Session 5}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 %\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo}
@@ -127,10 +127,7 @@
     point = line.split()
     l.append(float(point[0]))
     t.append(float(point[1]))
-tsq = []
-for time in t:
-    tsq.append(time*time)
-plot(l, tsq, '.')
+plot(l, t, '.')
     \end{lstlisting}
     \end{block}
   \end{columns}
@@ -192,7 +189,7 @@
 
 \begin{frame}[fragile]
   \frametitle{Problem 3 cont...}
-Create a sequence of images in which the damped oscillator($e^{x/10}sin(x)$) slowly evolves over time.
+Create a sequence of images in which the damped oscillator($e^{-x/10}sin(x)$) slowly evolves over time.
 \begin{columns}
 \column{0.35\textwidth}
 \includegraphics[width=1.5in,height=1.5in, interpolate=true]{data/plot2}
--- a/day1/session6.tex	Thu Feb 04 23:15:50 2010 +0530
+++ b/day1/session6.tex	Tue Mar 02 10:55:49 2010 +0530
@@ -78,7 +78,7 @@
 \author[FOSSEE] {FOSSEE}
 
 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
-\date[] {11 January, 2010\\Day 1, Session 6}
+\date[] {13 February, 2010\\Day 2, Session 2}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 %\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo}
--- a/day2/day2quiz.tex	Thu Feb 04 23:15:50 2010 +0530
+++ b/day2/day2quiz.tex	Tue Mar 02 10:55:49 2010 +0530
@@ -40,7 +40,7 @@
 \author[FOSSEE Team] {FOSSEE}
 
 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
-\date[] {\today \\ Day 2, Quiz 1}
+\date[] {\today \\ Day 2, Quiz}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 
@@ -94,7 +94,7 @@
 
 \begin{frame}
 \frametitle{\incqno }
-  What does '*' * 40 produce?
+  What does 't' * 40 produce?
 \end{frame}
 
 \begin{frame}[fragile]
--- a/day2/session1.tex	Thu Feb 04 23:15:50 2010 +0530
+++ b/day2/session1.tex	Tue Mar 02 10:55:49 2010 +0530
@@ -79,7 +79,7 @@
 \author[FOSSEE Team] {The FOSSEE Group}
 
 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
-\date[] {12 January, 2010\\Day 2, Session 1}
+\date[] {13 February, 2010\\Day 2, Session 3}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 %\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo}
@@ -255,6 +255,7 @@
 
 \begin{frame}[fragile]
   \frametitle{A bit about IPython}
+  Recall, we showed a few features of IPython, here is one more:
   \begin{itemize}
     \item IPython provides better help
     \item object.function?
@@ -262,10 +263,6 @@
 In []: a = 'Hello World'
 In []: a.lower?
     \end{lstlisting}
-    \item It provides tab completion
-        \begin{lstlisting}
-In []: a.s<Tab>
-    \end{lstlisting}
   \end{itemize}
 \end{frame}
 
@@ -278,6 +275,9 @@
   \begin{lstlisting}
 In []: ''.join(['a', 'b', 'c'])
 Out[]: 'abc'
+
+In []: ', '.join(['a', 'b', 'c'])
+Out[]: 'a, b, c'
   \end{lstlisting}
 \end{frame}
 
@@ -511,7 +511,7 @@
 \subsection{Basic Conditional flow}
 \begin{frame}[fragile]
   \frametitle{\typ{If...elif...else} example}
-Type out the code below in an editor. 
+Type the following code in an editor \& save as \alert{ladder.py}
   \small
   \begin{lstlisting}
 x = int(raw_input("Enter an integer:"))
--- a/day2/session2.tex	Thu Feb 04 23:15:50 2010 +0530
+++ b/day2/session2.tex	Tue Mar 02 10:55:49 2010 +0530
@@ -78,7 +78,7 @@
 \author[FOSSEE Team] {The FOSSEE Group}
 
 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
-\date[] {12 January, 2010\\Day 2, Session 2}
+\date[] {13 February, 2010\\Day 3, Session 1}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 %\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo}
@@ -208,19 +208,6 @@
   \item It appears that for all starting values there is a cycle of 4, 2, 1 at which the procedure loops.
 \end{enumerate}
     Write a program that accepts the starting value and prints out the Collatz sequence.
-\end{frame}
-
-\begin{frame}[fragile]{Problem 1.3}
-  Write a program that prints the following pyramid on the screen. 
-  \begin{lstlisting}
-1
-2  2
-3  3  3
-4  4  4  4
-  \end{lstlisting}
-The number of lines must be obtained from the user.\\
-\pause
-\emphbar{When can your code fail?}
 \inctime{5}
 \end{frame}
 
@@ -519,6 +506,24 @@
   \end{lstlisting}
 \end{frame}
 
+\begin{frame}[fragile]
+  \frametitle {What does this function do?}
+  \begin{lstlisting}
+def what( x, n ):
+    if n < 0: 
+       n = -n
+       x = 1.0 / x
+
+    z = 1.0
+    while n > 0:
+        if n % 2 == 1:
+            z *= x
+        x *= x
+        n /= 2
+    return z
+  \end{lstlisting}
+\end{frame} 
+
 \begin{frame}
   \frametitle{What did we learn?}
   \begin{itemize}
--- a/day2/session3.tex	Thu Feb 04 23:15:50 2010 +0530
+++ b/day2/session3.tex	Tue Mar 02 10:55:49 2010 +0530
@@ -78,7 +78,7 @@
 \author[FOSSEE Team] {The FOSSEE Group}
 
 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
-\date[] {12 January, 2010\\Day 2, Session 3}
+\date[] {13 February, 2010\\Day 3, Session 2}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 %\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo}
--- a/day2/session4.tex	Thu Feb 04 23:15:50 2010 +0530
+++ b/day2/session4.tex	Tue Mar 02 10:55:49 2010 +0530
@@ -100,7 +100,7 @@
 \author[FOSSEE] {FOSSEE}
 
 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
-\date[] {12 January, 2010\\Day 2, Session 4}
+\date[] {13 February, 2010\\Day 3, Session 4}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 %\pgfdeclareimage[height=0.75cm]{iitblogo}{iitblogo}
--- a/day2/session5.tex	Thu Feb 04 23:15:50 2010 +0530
+++ b/day2/session5.tex	Tue Mar 02 10:55:49 2010 +0530
@@ -78,7 +78,7 @@
 \author[FOSSEE] {FOSSEE}
 
 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
-\date[] {12 January, 2010\\Day 2, Session 5}
+\date[] {13 February, 2010\\Day 3, Session 3}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 %\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo}