In [1]:

    

import numpy as np 

nx,ny=6,4
X = np.random.randint(0,5,size=(nx,ny))
X


    

    
Out[1]:





array([[2, 3, 1, 0],
       [4, 3, 3, 4],
       [2, 0, 0, 1],
       [1, 3, 4, 2],
       [1, 4, 1, 2],
       [3, 1, 3, 0]])

In [2]:

    

X[:,slice(0,4,2)]


    

    
Out[2]:





array([[2, 1],
       [4, 3],
       [2, 0],
       [1, 4],
       [1, 1],
       [3, 3]])

In [3]:

    

stripe = (slice(None),slice(0,4,2))


    

In [4]:

    

X[stripe]


    

    
Out[4]:





array([[2, 1],
       [4, 3],
       [2, 0],
       [1, 4],
       [1, 1],
       [3, 3]])

In [ ]:

    




    

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