1 Creating a linear array:\\

     1 \textbf{Manipulating strings}

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

     4 Plotting two variables:\\

     3 String indexing starts from 0, like lists.

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

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

     5 \lstinline|s = `Hello World'|\\

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

     6 \lstinline|s[0:5]| gives \texttt{Hello}\\

     7 \lstinline|s[6:]| gives \textt{World}\\

     8 \lstinline|s[6::2]| gives \textt{Wrd}\\

     9 

    10 \lstinline|s.replace('e', 'a')| returns a new string with all e's

    11 replaced by a.  

    12 

    13 \lstinline|s.lower()| and \lstinline|s.upper()| return new strings

    14 with all lower and upper case letters, respectively.