In [8]:

    

import matplotlib.pyplot as plt
import numpy as np

# the MATLAB version of this is STEM()


    

In [22]:

    

x = np.linspace(0.1, 2*np.pi, 30)
markerline, stemlines, baseline = plt.stem(x, np.cos(x), '-.')
plt.setp(markerline, 'markerfacecolor', 'b')
plt.setp(baseline, 'color', 'black')

plt.show()


    

In [23]:

    

from ipywidgets import interact, interactive, fixed


    

In [44]:

    

def plot_discreate_sine(frequency, data_points):
    x = np.linspace(0.1, 2*np.pi, data_points)
    markerline, stemlines, baseline = plt.stem(x, np.cos(x*frequency), '-.')
    plt.setp(markerline, 'markerfacecolor', 'b')
    plt.setp(baseline, 'color', 'black')
    plt.grid()
    
    plt.show()


    

In [67]:

    

i = interact(plot_discreate_sine, frequency=(0,30), data_points=(1,50))


    

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