28 \section{Plotting from Data files}

    28 

    29 \begin{verbatim}

    30 l = [] #Empty List

    31 t = []

    32 for line in open('pendulum.txt'): # Opening & Reading files

    33     points = line.split() # Splitting a string

    34     l.append(float(points[0])) # Appending to a list

    35     t.append(float(points[1]))

    36 tsq = []

    37 for time in t:  #Iterating through lists

    38     tsq.append(t*t)

    39 plot(l, tsq, '.') # Plotting points

    40 \end{verbatim}