Python 最大/位置，数组 [[]]

Question

I have an array. I got the max value with max = np.max(List) . Now I need the position of the max value. I used this code:

x = np.where(a == a.max())

but it gives me that:

(array([0], dtype=int64), array([9], dtype=int64))

It contains the position but I don't know how to get it out of there. It would also be nice to know how to get the array below out of one of the two [] .

array([[10.39219 , 12.018309, 13.810752, 10.646565, 13.779528, 13.29911 ,
        13.650783, 12.464462, 13.427543, 14.388401]], dtype=float32)

Answer 1

Methods:

1. Use np.argmax :

List = np.array([10.39219 , 12.018309, 13.810752, 10.646565, 13.779528, 13.29911 , 13.650783, 12.464462, 13.427543, 14.388401])
_max = np.argmax(List)
_max
>>> 9

2. Change to list and use max and index methods:

List = np.array([10.39219 , 12.018309, 13.810752, 10.646565, 13.779528, 13.29911 , 13.650783, 12.464462, 13.427543, 14.388401])
_max = List.tolist().index(max(List))
_max
>>> 9

Answer 2

use np.argmax() to get the index

arr = array([[10.39219 , 12.018309, 13.810752, 10.646565, 13.779528, 13.29911 , 13.650783, 12.464462, 13.427543, 14.388401]], dtype=float32)
np.argmax(arr)