% Quiz slides day 1 quiz 1

\title[Basic Python]{Python for science and engineering: Day 1, Quiz 1}

\date[] {\today \\Day 1, Quiz 1}

    \item Name:

    \item University/College/Company:

    \item Student/Teacher/Professional:

\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}

  What code would you use to separate the line into fields?

  In []: a = [1, 2, 5, 9]

  In []: a[0:-1]

  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?

%% \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{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}

In []: marks = [10, 20, 30, 50, 55, 

                75, 83] 

Given the above marks, how will you calculate the \alert{mean} and

\alert{standard deviation}?

%\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}

Write the code to read a file \texttt{data.txt} and print each line of it?