remove a specific column in numpy

Question

>>> arr = np.array([[1,2,3,4], [5,6,7,8], [9,10,11,12]])
>>> arr
array([[ 1,  2,  3,  4],
       [ 5,  6,  7,  8],
       [ 9, 10, 11, 12]])
         


        

Answer 1

If you ever want to delete more than one columns, you just pass indices of columns you want deleted as a list, like this:

>>> a = np.arange(12).reshape(3,4)
>>> a
array([[ 0,  1,  2,  3],
       [ 4,  5,  6,  7],
       [ 8,  9, 10, 11]])
>>> np.delete(a, [1,3], axis=1)
array([[ 0,  2],
       [ 4,  6],
       [ 8, 10]])