--- a/day1/cheatsheet4.tex	Wed Jan 06 13:59:03 2010 +0530
+++ b/day1/cheatsheet4.tex	Sun Jan 10 16:43:15 2010 +0530
@@ -136,7 +136,7 @@
 \begin{lstlisting}
 In []: C[:,::2]
 Out[]: 
-xarray([[ 1,  2],
+array([[ 1,  2],
        [ 0,  0],
        [-1,  7]])
 \end{lstlisting}

--- a/day1/session1.tex	Wed Jan 06 13:59:03 2010 +0530
+++ b/day1/session1.tex	Sun Jan 10 16:43:15 2010 +0530
@@ -521,3 +521,33 @@
 
 \end{document}
 
+%% Questions for Quiz %%
+%% ------------------ %%
+
+\begin{frame}[fragile]
+\frametitle{\incqno }
+Describe the plot produced by the following:
+\begin{lstlisting}
+In []: x = linspace(0, 2*pi)
+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
+you set the $x$ and $y$ labels of the plot?
+\end{frame}
+
+\begin{frame}
+\frametitle{\incqno }
+How will you set the x and y axis limits so that the region of interest
+is in the rectangle $(0, -1.5)$ (left bottom coordinate) and $(2\pi,
+1.5)$ (right top coordinate)?
+\end{frame}
+
+\begin{frame}
+\frametitle{\incqno }
+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}
+

--- a/day1/session2.tex	Wed Jan 06 13:59:03 2010 +0530
+++ b/day1/session2.tex	Sun Jan 10 16:43:15 2010 +0530
@@ -479,3 +479,47 @@
 \end{frame}
 
 \end{document}
+
+%% Questions for Quiz %%
+%% ------------------ %%
+
+\begin{frame}[fragile]
+\frametitle{\incqno }
+  \begin{lstlisting}
+  In []: a = [1, 2, 5, 9]
+  In []: a[0:-1]
+  \end{lstlisting}
+  What is the output?
+\end{frame}
+
+\begin{frame}
+\frametitle{\incqno }
+  How do you combine two lists \emph{a} and \emph{b} to produce one list?
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{\incqno }
+  \begin{lstlisting}
+  In []: a = [1, 2, 5, 9]
+  \end{lstlisting}
+  How do you add the value 10 to the end of this list?
+\end{frame}
+
+\begin{frame}
+\frametitle{\incqno }
+Write the code to read a file \texttt{data.txt} and print each line of it?
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{\incqno }
+The following code snippet has an error/bug:
+\begin{lstlisting}
+In []: l = [0.1, 0.2, 0.3, 0.4]
+In []: t = [0.69, 0.90, 1.19, 1.30]
+In []: tsq = []
+In []: for time in t:
+ ....:     tsq.append(time*time)
+ ....:     plot(l, tsq)
+\end{lstlisting}
+What is the error? How do you fix it?
+\end{frame}

--- a/day1/session3.tex	Wed Jan 06 13:59:03 2010 +0530
+++ b/day1/session3.tex	Sun Jan 10 16:43:15 2010 +0530
@@ -453,3 +453,85 @@
 \end{frame}
 
 \end{document}
+
+%% Questions for Quiz %%
+%% ------------------ %%
+
+\begin{frame}
+\frametitle{\incqno }
+  A sample line from a Comma Separated Values (CSV) file:\\
+  \vspace*{0.2in}
+  \emph{Rossum, Guido, 42, 56, 34, 54}\\
+  \vspace*{0.2in}
+  What code would you use to separate the line into fields?
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{\incqno }
+  \begin{lstlisting}
+  In []: a = [1, 2, 5, 9]
+  \end{lstlisting}
+  How do you find the length of this list?
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{\incqno }
+  \begin{lstlisting}
+  In [1]: d = {
+          'a': 1,
+          'b': 2
+          }
+  In [2]: print d['c']
+  \end{lstlisting}
+  What is the output?
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{\incqno }
+\begin{lstlisting}
+In []: sc = {'A': 10, 'B': 20, 
+             'C': 70}
+\end{lstlisting}
+Given the above dictionary, what command will you give to plot a
+pie-chart?
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{\incqno }
+\begin{lstlisting}
+In []: marks = [10, 20, 30, 50, 55, 
+                75, 83] 
+\end{lstlisting}
+Given the above marks, how will you calculate the \alert{mean} and
+\alert{standard deviation}?
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{\incqno }
+\begin{lstlisting}
+In []: marks = [10, 20, 30, 50, 55, 
+               75, 83] 
+\end{lstlisting}
+How will you convert the list \texttt{marks} to an \alert{array}?
+\end{frame}
+
+%% \begin{frame}[fragile]
+%% \frametitle{\incqno }
+%%   \begin{lstlisting}
+%%   for x in "abcd":
+%%       print x
+
+%%   a
+%%   b
+%%   c
+%%   d
+%%   \end{lstlisting}
+%%   How do you get the following output? 
+%%   \begin{lstlisting}
+%%     0 a
+%%     1 b
+%%     2 c
+%%     3 d
+%%   \end{lstlisting}
+%% \end{frame}
+

--- a/day1/session4.tex	Wed Jan 06 13:59:03 2010 +0530
+++ b/day1/session4.tex	Sun Jan 10 16:43:15 2010 +0530
@@ -607,3 +607,98 @@
 \end{frame}
 
 \end{document}
+
+%% Questions for Quiz %%
+%% ------------------ %%
+
+\begin{frame}[fragile]
+\frametitle{\incqno }
+\begin{lstlisting}
+In []: a = array([[1, 2],
+                  [3, 4]])
+In []: a[1,0] = 0
+\end{lstlisting}
+What is the resulting array?
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{\incqno }
+\begin{lstlisting}
+  In []: x = array(([1,2,3,4],
+                    [2,3,4,5]))
+  In []: x[-2][-3] = 4
+  In []: print x
+\end{lstlisting}
+What will be printed?
+\end{frame}
+
+%% \begin{frame}[fragile]
+%% \frametitle{\incqno }
+%% \begin{lstlisting}
+%%   In []: x = array([[1,2,3,4],
+%%                     [3,4,2,5]])
+%% \end{lstlisting}
+%% What is the \lstinline+shape+ of this array?
+%% \end{frame}
+
+\begin{frame}[fragile]
+\frametitle{\incqno }
+\begin{lstlisting}
+  In []: x = array([[1,2,3,4]])
+\end{lstlisting}
+How to \lstinline+x+ to \lstinline+array([[1,2,0,4]])+?
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{\incqno }
+\begin{lstlisting}
+  In []: x = array([[1,2,3,4],
+                    [3,4,2,5]])
+\end{lstlisting}
+How do you get the following slice of \lstinline+x+?
+\begin{lstlisting}
+array([[2,3],
+       [4,2]])
+\end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{\incqno }
+\begin{lstlisting}
+In []: a = array([[1, 2],
+                  [3, 4]])
+\end{lstlisting}
+How do you get the transpose of this array?
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{\incqno }
+\begin{lstlisting}
+In []: a = array([[1, 2],
+                  [3, 4]])
+In []: b = array([[1, 1],
+                  [2, 2]])
+In []: a*b
+\end{lstlisting}
+What does this produce?
+\end{frame}
+
+\begin{frame}
+\frametitle{\incqno }
+What command do you use to find the inverse of a matrix and its
+eigenvalues?
+\end{frame}
+
+%% \begin{frame}
+%% \frametitle{\incqno }
+%% The file \lstinline+datafile.txt+ contains 3 columns of data.  What
+%% command will you use to read the entire data file into an array?
+%% \end{frame}
+
+%% \begin{frame}
+%% \frametitle{\incqno }
+%% If the contents of the file \lstinline+datafile.txt+ is read into an
+%% $N\times3$ array called \lstinline+data+, how would you obtain the third
+%% column of this data?
+%% \end{frame}
+

--- a/day1/session6.tex	Wed Jan 06 13:59:03 2010 +0530
+++ b/day1/session6.tex	Sun Jan 10 16:43:15 2010 +0530
@@ -428,3 +428,130 @@
 \end{frame}
 
 \end{document}
+
+%% Questions for Quiz %%
+%% ------------------ %%
+
+\begin{frame}
+\frametitle{\incqno }
+Given a 4x4 matrix \texttt{A} and a 4-vector \texttt{b}, what command do
+you use to solve for the equation \\
+\texttt{Ax = b}?
+\end{frame}
+
+\begin{frame}
+\frametitle{\incqno }
+What command will you use if you wish to integrate a system of ODEs?
+\end{frame}
+
+\begin{frame}
+\frametitle{\incqno }
+How do you calculate the roots of the polynomial, $y = 1 + 6x + 8x^2 +
+x^3$?
+\end{frame}
+
+\begin{frame}
+\frametitle{\incqno }
+Two arrays \lstinline+a+ and \lstinline+b+ are numerically almost equal, what command
+do you use to check if this is true?
+\end{frame}
+
+%% \begin{frame}[fragile]
+%% \frametitle{\incqno }
+%% \begin{lstlisting}
+%%   In []: x = arange(0, 1, 0.25)
+%%   In []: print x
+%% \end{lstlisting}
+%% What will be printed?
+%% \end{frame}
+
+
+%% \begin{frame}[fragile]
+%% \frametitle{\incqno }
+%% \begin{lstlisting}
+%% from scipy.integrate import quad
+%% def f(x):
+%%     res = x*cos(x)
+%% quad(f, 0, 1)
+%% \end{lstlisting}
+%% What changes will you make to the above code to make it work?
+%% \end{frame}
+
+%% \begin{frame}
+%% \frametitle{\incqno }
+%% What two commands will you use to create and evaluate a spline given
+%% some data?
+%% \end{frame}
+
+%% \begin{frame}[fragile]
+%% \frametitle{\incqno }
+%% What would be the result?
+%% \begin{lstlisting}
+%%   In []: x
+%%   array([[0, 1, 2],
+%%          [3, 4, 5],
+%%          [6, 7, 8]])
+%%   In []: x[::-1,:]
+%% \end{lstlisting}
+%% Hint:
+%% \begin{lstlisting}
+%%   In []: x = arange(9)
+%%   In []: x[::-1]
+%%   array([8, 7, 6, 5, 4, 3, 2, 1, 0])
+%% \end{lstlisting}
+%% \end{frame}
+
+%% \begin{frame}[fragile]
+%% \frametitle{\incqno }
+%% What would be the result?
+%% \begin{lstlisting}
+%%   In []: y = arange(3)
+%%   In []: x = linspace(0,3,3)
+%%   In []: x-y
+%% \end{lstlisting}
+%% \end{frame}
+
+%% \begin{frame}[fragile]
+%% \frametitle{\incqno }
+%% \begin{lstlisting}
+%%   In []: x
+%%   array([[ 0, 1, 2, 3],
+%%          [ 4, 5, 6, 7],
+%%          [ 8, 9, 10, 11],
+%%          [12, 13, 14, 15]])
+%% \end{lstlisting}
+%% How will you get the following \lstinline+x+?
+%% \begin{lstlisting}
+%%   array([[ 5, 7],
+%%          [ 9, 11]])
+%% \end{lstlisting}
+%% \end{frame}
+
+%% \begin{frame}[fragile]
+%% \frametitle{\incqno }
+%% What would be the output?
+%% \begin{lstlisting}
+%%   In []: y = arange(4)
+%%   In []: x = array(([1,2,3,2],[1,3,6,0]))
+%%   In []: x + y
+%% \end{lstlisting}
+%% \end{frame}
+
+%% \begin{frame}[fragile]
+%% \frametitle{\incqno }
+%% \begin{lstlisting}
+%%   In []: line = plot(x, sin(x))
+%% \end{lstlisting}
+%% Use the \lstinline+set_linewidth+ method to set width of \lstinline+line+ to 2.
+%% \end{frame}
+
+%% \begin{frame}[fragile]
+%% \frametitle{\incqno }
+%% What would be the output?
+%% \begin{lstlisting}
+%%   In []: x = arange(9)
+%%   In []: y = arange(9.)
+%%   In []: x == y
+%% \end{lstlisting}
+%% \end{frame}
+

--- a/day1quiz1.tex	Wed Jan 06 13:59:03 2010 +0530
+++ b/day1quiz1.tex	Sun Jan 10 16:43:15 2010 +0530
@@ -42,8 +42,6 @@
 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
 \date[] {\today \\Day 1, Quiz 1}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
-
 \begin{document}
 
 \begin{frame}
@@ -60,216 +58,4 @@
   \end{itemize}
 \end{frame}
 
-\begin{frame}[fragile]
-\frametitle{\incqno }
-Describe the plot produced by the following:
-
-\begin{lstlisting}
-In []: x = linspace(0, 2*pi)
-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
-you set the $x$ and $y$ labels of the plot?
-\end{frame}
-
-\begin{frame}
-\frametitle{\incqno }
-How will you set the x and y axis limits so that the region of interest
-is in the rectangle $(0, -1.5)$ (left bottom coordinate) and $(2\pi,
-1.5)$ (right top coordinate)?
-\end{frame}
-
-\begin{frame}
-\frametitle{\incqno }
-  A sample line from a Comma Separated Values (CSV) file:\\
-  \vspace*{0.2in}
-  \emph{Rossum, Guido, 42, 56, 34, 54}\\
-  \vspace*{0.2in}
-  What code would you use to separate the line into fields?
-\end{frame}
-
-\begin{frame}[fragile]
-\frametitle{\incqno }
-  \begin{lstlisting}
-  In []: a = [1, 2, 5, 9]
-  In []: a[0:-1]
-  \end{lstlisting}
-  What is the output?
-\end{frame}
-
-\begin{frame}
-\frametitle{\incqno }
-  How do you combine two lists \emph{a} and \emph{b} to produce one list?
-\end{frame}
-
-\begin{frame}[fragile]
-\frametitle{\incqno }
-  \begin{lstlisting}
-  In []: a = [1, 2, 5, 9]
-  \end{lstlisting}
-  How do you add the value 10 to the end of this list?
-\end{frame}
-
-\begin{frame}[fragile]
-\frametitle{\incqno }
-  \begin{lstlisting}
-  In []: a = [1, 2, 5, 9]
-  \end{lstlisting}
-  How do you find the length of this list?
-\end{frame}
-
-\begin{frame}[fragile]
-\frametitle{\incqno }
-  \begin{lstlisting}
-  In [1]: d = {
-          'a': 1,
-          'b': 2
-          }
-  In [2]: print d['c']
-  \end{lstlisting}
-  What is the output?
-\end{frame}
-
-%% \begin{frame}[fragile]
-%% \frametitle{\incqno }
-%%   \begin{lstlisting}
-%%   for x in "abcd":
-%%       print x
-
-%%   a
-%%   b
-%%   c
-%%   d
-%%   \end{lstlisting}
-%%   How do you get the following output? 
-%%   \begin{lstlisting}
-%%     0 a
-%%     1 b
-%%     2 c
-%%     3 d
-%%   \end{lstlisting}
-%% \end{frame}
-
-\begin{frame}
-\frametitle{\incqno }
-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}
-\begin{lstlisting}
-In []: sc = {'A': 10, 'B': 20, 
-             'C': 70}
-\end{lstlisting}
-Given the above dictionary, what command will you give to plot a
-pie-chart?
-\end{frame}
-
-
-\begin{frame}[fragile]
-\frametitle{\incqno }
-\begin{lstlisting}
-In []: marks = [10, 20, 30, 50, 55, 
-                75, 83] 
-\end{lstlisting}
-
-Given the above marks, how will you calculate the \alert{mean} and
-\alert{standard deviation}?
-\end{frame}
-
-%\begin{frame}[fragile]
-%\frametitle{\incqno }
-%\begin{lstlisting}
-%In []: marks = [10, 20, 30, 50, 55, 
-%                75, 83] 
-%\end{lstlisting}
-%How will you convert the list \texttt{marks} to an \alert{array}?
-%\end{frame}
-
-%% \begin{frame}[fragile]
-%% \frametitle{\incqno }
-%% \begin{lstlisting}
-%% In []: a = array([[1, 2],
-%%                   [3, 4]])
-%% In []: a[1,0] = 0
-%% \end{lstlisting}
-%% What is the resulting matrix?
-%% \end{frame}
-
-%% \begin{frame}[fragile]
-%% \frametitle{\incqno }
-%% \begin{lstlisting}
-%% In []: a = array([[1, 2],
-%%                   [3, 4]])
-%% \end{lstlisting}
-%% How do you get the transpose of this array?
-%% \end{frame}
-
-%% \begin{frame}[fragile]
-%% \frametitle{\incqno }
-%% \begin{lstlisting}
-%% In []: a = array([[1, 2],
-%%                   [3, 4]])
-%% In []: b = array([[1, 1],
-%%                   [2, 2]])
-%% In []: a*b
-%% \end{lstlisting}
-%% What does this produce?
-%% \end{frame}
-
-%% \begin{frame}
-%% \frametitle{\incqno }
-%% What command do you use to find the inverse of a matrix and its
-%% eigenvalues?
-%% \end{frame}
-
-%% \begin{frame}
-%% \frametitle{\incqno }
-%% Given a 4x4 matrix \texttt{A} and a 4-vector \texttt{b}, what command do
-%% you use to solve for the equation \\
-%% \texttt{Ax = b}?
-%% \end{frame}
-
-\begin{frame}
-\frametitle{\incqno }
-Write the code to read a file \texttt{data.txt} and print each line of it?
-\end{frame}
-
-\begin{frame}[fragile]
-\frametitle{\incqno }
-What is the output of:
-\begin{lstlisting}
-In []: x=linspace(0 , 2 * pi)
-In []: plot(x, cos(x),'go')
-\end{lstlisting}
-\end{frame}
-
-\begin{frame}
-\frametitle{\incqno }
-Draw a plot with line width 3.
-\end{frame}
-
-\begin{frame}
-\frametitle{\incqno }
-Setting x and y axis limits.
-\end{frame}
-
-\begin{frame}[fragile]
-\frametitle{\incqno }
-The following code snippet has an error/bug:
-\begin{lstlisting}
-In []: l = [0.1, 0.2, 0.3, 0.4]
-In []: t = [0.69, 0.90, 1.19, 1.30]
-In []: tsq = []
-In []: for time in t:
- ....:     tsq.append(time*time)
- ....:     plot(l, tsq)
-\end{lstlisting}
-
-What is the error? How do you fix it?
-\end{frame}
-
 \end{document}

--- a/day1quiz2.tex	Wed Jan 06 13:59:03 2010 +0530
+++ b/day1quiz2.tex	Sun Jan 10 16:43:15 2010 +0530
@@ -61,237 +61,6 @@
   \end{itemize}
 \end{frame}
 
-%% \begin{frame}[fragile]
-%% \frametitle{\incqno }
-%% \begin{lstlisting}
-%%   In []: x = array([[1,2,3,4],
-%%                     [3,4,2,5]])
-%% \end{lstlisting}
-%% What is the \lstinline+shape+ of this array?
-%% \end{frame}
-
-
-\begin{frame}[fragile]
-\frametitle{\incqno }
-\begin{lstlisting}
-  In []: x = array([[1,2,3,4]])
-\end{lstlisting}
-How to change the third element (i.e.\ 3) of \lstinline+x+ to 0?
-\end{frame}
-
-\begin{frame}[fragile]
-\frametitle{\incqno }
-\begin{lstlisting}
-  In []: x = array([[1,2,3,4],
-                    [3,4,2,5]])
-\end{lstlisting}
-How do you get the following slice of \lstinline+x+?
-\begin{lstlisting}
-array([[2,3],
-       [4,2]])
-\end{lstlisting}
-\end{frame}
-
-
-%% \begin{frame}
-%% \frametitle{\incqno }
-%% The file \lstinline+datafile.txt+ contains 3 columns of data.  What
-%% command will you use to read the entire data file into an array?
-%% \end{frame}
-
-%% \begin{frame}
-%% \frametitle{\incqno }
-
-%% If the contents of the file \lstinline+datafile.txt+ is read into an
-%% $N\times3$ array called \lstinline+data+, how would you obtain the third
-%% column of this data?
-
-%% \end{frame}
-
-\begin{frame}[fragile]
-\frametitle{\incqno }
-\begin{lstlisting}
-  In []: x = array(([1,2,3,4],
-                    [2,3,4,5]))
-  In []: x[-2][-3] = 4
-  In []: print x
-\end{lstlisting}
-What will be printed?
-\end{frame}
-
-
-%% \begin{frame}[fragile]
-%% \frametitle{\incqno }
-%% \begin{lstlisting}
-%%   In []: x = arange(0, 1, 0.25)
-%%   In []: print x
-%% \end{lstlisting}
-%% What will be printed?
-%% \end{frame}
+\end{document}
 
 
-%% \begin{frame}[fragile]
-%% \frametitle{\incqno }
-%% \begin{lstlisting}
-%% from scipy.integrate import quad
-%% def f(x):
-%%     res = x*cos(x)
-
-%% quad(f, 0, 1)
-%% \end{lstlisting}
-
-%% What changes will you make to the above code to make it work?
-%% \end{frame}
-
-%% \begin{frame}
-%% \frametitle{\incqno }
-%% What two commands will you use to create and evaluate a spline given
-%% some data?
-%% \end{frame}
-
-\begin{frame}
-\frametitle{\incqno }
-What command will you use if you wish to integrate a system of ODEs?
-\end{frame}
-
-\begin{frame}
-\frametitle{\incqno }
-How do you calculate the roots of the polynomial, $y = 1 + 6x + 8x^2 +
-x^3$?
-\end{frame}
-
-\begin{frame}
-\frametitle{\incqno }
-
-Two arrays \lstinline+a+ and \lstinline+b+ are numerically almost equal, what command
-do you use to check if this is true?
-
-\end{frame}
-
-\begin{frame}[fragile]
-\frametitle{\incqno }
-\begin{lstlisting}
-In []: marks = [10, 20, 30, 50, 55, 
-               75, 83] 
-\end{lstlisting}
-How will you convert the list \texttt{marks} to an \alert{array}?
-\end{frame}
-
-\begin{frame}[fragile]
-\frametitle{\incqno }
-\begin{lstlisting}
-In []: a = array([[1, 2],
-                  [3, 4]])
-In []: a[1,0] = 0
-\end{lstlisting}
-What is the resulting matrix?
-\end{frame}
-
-\begin{frame}[fragile]
-\frametitle{\incqno }
-\begin{lstlisting}
-In []: a = array([[1, 2],
-                  [3, 4]])
-\end{lstlisting}
-How do you get the transpose of this array?
-\end{frame}
-
-\begin{frame}[fragile]
-\frametitle{\incqno }
-\begin{lstlisting}
-In []: a = array([[1, 2],
-                  [3, 4]])
-In []: b = array([[1, 1],
-                  [2, 2]])
-In []: a*b
-\end{lstlisting}
-What does this produce?
-\end{frame}
-
-\begin{frame}
-\frametitle{\incqno }
-What command do you use to find the inverse of a matrix and its
-eigenvalues?
-\end{frame}
-
-\begin{frame}
-\frametitle{\incqno }
-Given a 4x4 matrix \texttt{A} and a 4-vector \texttt{b}, what command do
-you use to solve for the equation \\
-\texttt{Ax = b}?
-\end{frame}
-
-\end{document}
-
-%% \begin{frame}[fragile]
-%% \frametitle{\incqno }
-%% What would be the result?
-%% \begin{lstlisting}
-%%   In []: x
-%%   array([[0, 1, 2],
-%%          [3, 4, 5],
-%%          [6, 7, 8]])
-%%   In []: x[::-1,:]
-%% \end{lstlisting}
-%% Hint:
-%% \begin{lstlisting}
-%%   In []: x = arange(9)
-%%   In []: x[::-1]
-%%   array([8, 7, 6, 5, 4, 3, 2, 1, 0])
-%% \end{lstlisting}
-%% \end{frame}
-
-%% \begin{frame}[fragile]
-%% \frametitle{\incqno }
-%% What would be the result?
-%% \begin{lstlisting}
-%%   In []: y = arange(3)
-%%   In []: x = linspace(0,3,3)
-%%   In []: x-y
-%% \end{lstlisting}
-%% \end{frame}
-
-%% \begin{frame}[fragile]
-%% \frametitle{\incqno }
-%% \begin{lstlisting}
-%%   In []: x
-%%   array([[ 0, 1, 2, 3],
-%%          [ 4, 5, 6, 7],
-%%          [ 8, 9, 10, 11],
-%%          [12, 13, 14, 15]])
-%% \end{lstlisting}
-%% How will you get the following \lstinline+x+?
-%% \begin{lstlisting}
-%%   array([[ 5, 7],
-%%          [ 9, 11]])
-%% \end{lstlisting}
-%% \end{frame}
-
-%% \begin{frame}[fragile]
-%% \frametitle{\incqno }
-%% What would be the output?
-%% \begin{lstlisting}
-%%   In []: y = arange(4)
-%%   In []: x = array(([1,2,3,2],[1,3,6,0]))
-%%   In []: x + y
-%% \end{lstlisting}
-%% \end{frame}
-
-%% \begin{frame}[fragile]
-%% \frametitle{\incqno }
-%% \begin{lstlisting}
-%%   In []: line = plot(x, sin(x))
-%% \end{lstlisting}
-%% Use the \lstinline+set_linewidth+ method to set width of \lstinline+line+ to 2.
-%% \end{frame}
-
-%% \begin{frame}[fragile]
-%% \frametitle{\incqno }
-%% What would be the output?
-%% \begin{lstlisting}
-%%   In []: x = arange(9)
-%%   In []: y = arange(9.)
-%%   In []: x == y
-%% \end{lstlisting}
-%% \end{frame}
-