610 

   611 %% Questions for Quiz %%

   612 %% ------------------ %%

   613 

   614 \begin{frame}[fragile]

   615 \frametitle{\incqno }

   616 \begin{lstlisting}

   617 In []: a = array([[1, 2],

   618                   [3, 4]])

   619 In []: a[1,0] = 0

   620 \end{lstlisting}

   621 What is the resulting array?

   622 \end{frame}

   623 

   624 \begin{frame}[fragile]

   625 \frametitle{\incqno }

   626 \begin{lstlisting}

   627   In []: x = array(([1,2,3,4],

   628                     [2,3,4,5]))

   629   In []: x[-2][-3] = 4

   630   In []: print x

   631 \end{lstlisting}

   632 What will be printed?

   633 \end{frame}

   634 

   635 %% \begin{frame}[fragile]

   636 %% \frametitle{\incqno }

   637 %% \begin{lstlisting}

   638 %%   In []: x = array([[1,2,3,4],

   639 %%                     [3,4,2,5]])

   640 %% \end{lstlisting}

   641 %% What is the \lstinline+shape+ of this array?

   642 %% \end{frame}

   643 

   644 \begin{frame}[fragile]

   645 \frametitle{\incqno }

   646 \begin{lstlisting}

   647   In []: x = array([[1,2,3,4]])

   648 \end{lstlisting}

   649 How to \lstinline+x+ to \lstinline+array([[1,2,0,4]])+?

   650 \end{frame}

   651 

   652 \begin{frame}[fragile]

   653 \frametitle{\incqno }

   654 \begin{lstlisting}

   655   In []: x = array([[1,2,3,4],

   656                     [3,4,2,5]])

   657 \end{lstlisting}

   658 How do you get the following slice of \lstinline+x+?

   659 \begin{lstlisting}

   660 array([[2,3],

   661        [4,2]])

   662 \end{lstlisting}

   663 \end{frame}

   664 

   665 \begin{frame}[fragile]

   666 \frametitle{\incqno }

   667 \begin{lstlisting}

   668 In []: a = array([[1, 2],

   669                   [3, 4]])

   670 \end{lstlisting}

   671 How do you get the transpose of this array?

   672 \end{frame}

   673 

   674 \begin{frame}[fragile]

   675 \frametitle{\incqno }

   676 \begin{lstlisting}

   677 In []: a = array([[1, 2],

   678                   [3, 4]])

   679 In []: b = array([[1, 1],

   680                   [2, 2]])

   681 In []: a*b

   682 \end{lstlisting}

   683 What does this produce?

   684 \end{frame}

   685 

   686 \begin{frame}

   687 \frametitle{\incqno }

   688 What command do you use to find the inverse of a matrix and its

   689 eigenvalues?

   690 \end{frame}

   691 

   692 %% \begin{frame}

   693 %% \frametitle{\incqno }

   694 %% The file \lstinline+datafile.txt+ contains 3 columns of data.  What

   695 %% command will you use to read the entire data file into an array?

   696 %% \end{frame}

   697 

   698 %% \begin{frame}

   699 %% \frametitle{\incqno }

   700 %% If the contents of the file \lstinline+datafile.txt+ is read into an

   701 %% $N\times3$ array called \lstinline+data+, how would you obtain the third

   702 %% column of this data?

   703 %% \end{frame}

   704