text: import matplotlib.pyplot as plt
  import numpy as np
  import math
  
  points = 50
  stop = 2*math.pi
  step =  stop / points
  xpoints = np.arange(0,stop,step)
  
  fig, (ax1, ax2) = plt.subplots(2)
  fig.suptitle('Vertically stacked subplots')
  ax1.set_ylabel("sin")
  ax1.plot(xpoints, np.sin(xpoints))
  ax2.set_ylabel("cos")
  ax2.plot(xpoints, np.cos(xpoints))
  plt.show()
  