text: import matplotlib.pyplot as plt
  import numpy as np
  
  x = np.linspace(-50,50,1000)
  
  def func1(xvals):
  	yvals = np.sin(xvals)/xvals
  	return yvals
  
  y = func1(x)
  
  fig = plt.figure(figsize=(10,8))
  ax1 = fig.add_subplot(111)
  ax1.set_xlim((-10*np.pi,10*np.pi))
  ax1.set_title('sinc(x)')
  ax1.plot(x,y,'m-')
  
  plt.show()
  
  