

In [41]:

    
import matplotlib.pyplot as plt
import math
import numpy as np



In [42]:

    
%matplotlib inline

can't use range(-10,10), because range only accept integer as step



In [43]:

    
x=[i for i in np.arange(-10,10,0.01)]



In [44]:

    
y=[1/(1+math.exp(-1*x_)) for x_ in x]



In [45]:

    
plt.scatter(x,y)









    Out[45]:





<matplotlib.collections.PathCollection at 0x7fc11aea4908>



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