title: Generating Pulse Amplitude Modulation using sine wave and PWM signal using python
body: <p>I am using the below codes so as to generate a Pulse Amplitude
    Modulation signal by using the Boolean operation between sine wave and 
    Pulse Width Modulation(PWM) signal.I am using the vectorisation method 
    so as to get zero values where the PWM signal is low(zero or false) and
    sine wave where the PWM values as high (True or one). Please refer the 
    below screen shot for the required output.In addition to this how do 
    you automate the PAM wave generation as I am facing problem with 
    spacing of x values?</p>
  
  <pre><code>        import numpy as np
          import matplotlib.pyplot as plt
          from pylab import *
  
          percent=50.0
          TimePeriod=10.0 #Frozen Value Do not change
          Cycles=10 #Frozen Value Do not change
          dt=0.01 #Frozen Value Do not change
  
          t=np.arange(0,Cycles*TimePeriod,dt); 
          pwm= t%TimePeriod&lt;TimePeriod*percent/100
  
          x=np.linspace(-10,10,10000) #Frozen Value Do not change
          y=(np.sin(x))
  
          y[(pwm =='False')] = 0      #Vectorisation for zero values
          y[(pwm =='True')] = (y-pwm) # #Vectorisation for sine wave
          plt.plot(t,y)
  
          plt.ylim([-3,3])
          plt.grid()
          plt.show() 
  </code></pre>
  
  <p><code></code></p>
  
  <p><a href="https://i.stack.imgur.com/n7V0O.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/n7V0O.png" alt="enter image description here"></a>       </p>