text: """
  From the command line enter
          python plot_file filename
  to plot the file.
  
  """
  import matplotlib.pyplot as plt
  import sys
  
  def plot_file(filename):
      with open(filename, 'r') as the_file:
              data = [float(v) for v in the_file.read().split()]
      print 'file length ', len(data)
      plt.figure(1)
      plt.plot(data)
      lines = plt.plot(data)
      plt.setp(lines, linewidth=3, color='r')
      #plt.axis([0, len(data), -1, 2])
      plt.show()
  
  if __name__ == '__main__':
      args = sys.argv
      plot_file(
          filename=args[1]
          )
  