1
2
3
1
2
3
1
2
3
30
30
30
20
20
20
10
10
10
*
30
60
90
20
40
60
10
20
30
>>> A = np.array([10, 20, 30])
>>> B = np.array([1, 2, 3])
>>> A[:, np.newaxis]
array([[10],
[20],
[30]])
>>> A[:, np.newaxis] * B
array([[10, 20, 30],
[20, 40, 60],
[30, 60, 90]])
>>>