cara mengubah nilai kolom dalam array numpy
>>> a = np.zeros((2,2), dtype=np.int)
>>> a[:, 0] = 1
>>> a
array([[1, 0],
[1, 0]])
the other guy
>>> a = np.zeros((2,2), dtype=np.int)
>>> a[:, 0] = 1
>>> a
array([[1, 0],
[1, 0]])