I have an array like:
a =np.array([[1,2,3,5,8,7,2,1,3,5,1,2,20,21],[3,8,3,9,8,7,10,1,3,5,1,2,20,21]])
requirement:
need to access index value with given step. For an example step value 3. Only index value not an elements value.
Required Output:
[[0,3,6,9,12],[0,3,6,9,12]]
