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diff --git a/day1quiz2.tex b/day1quiz2.tex index b7bfe2f..05ab609 100644 --- a/day1quiz2.tex +++ b/day1quiz2.tex @@ -61,237 +61,6 @@ On the top right hand corner please write down the following: \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} - - -%% \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} |