1 Creating a linear array:\\

     1 \textbf{Getting Started -- files}

     2 {\ex \lstinline|    x = linspace(0, 2*pi, 50)|}

     4 Plotting two variables:\\

     3 \lstinline|f = open('filename')| returns a file object. \lstinline|f|

     5 {\ex \lstinline|    plot(x, sin(x))|}

     4 can be used to perform further operations on the file. 

     7 Plotting two lists of equal length x, y:\\

     6 \lstinline|f.read()| reads the whole file and returns the contents. 

     8 {\ex \lstinline|    plot(x, y)|}

     7 

     8 \lstinline|f.close()| closes the file. 

     9 

    10 \lstinline|for line in open('filename'):| -- iterate over the file

    11 line-by-line. 

    12