提取numpy的陣列的Python

Question

在列的特定範圍我有一個數組：

e = np.array([[ 0, 1, 2, 3, 5, 6, 7, 8], 
       [ 4, 5, 6, 7, 5, 3, 2, 5], 
       [ 8, 9, 10, 11, 4, 5, 3, 5]]) 

欲通過它的列在RANGE提取數組，如果我想利用在範圍1列直到5，它將返回

e = np.array([[ 1, 2, 3, 5, ], 
       [ 5, 6, 7, 5, ], 
       [ 9, 10, 11, 4, ]]) 

如何解決？謝謝

Answer 1

你可以使用e [：，1：5]來檢索你想要的。

In [1]: import numpy as np 

In [2]: e = np.array([[ 0, 1, 2, 3, 5, 6, 7, 8], 
    ...:    [ 4, 5, 6, 7, 5, 3, 2, 5], 
    ...:    [ 8, 9, 10, 11, 4, 5, 3, 5]]) 

In [3]: e[:, 1:5] 
Out[3]: 
array([[ 1, 2, 3, 5], 
     [ 5, 6, 7, 5], 
     [ 9, 10, 11, 4]]) 

https://docs.scipy.org/doc/numpy/reference/arrays.indexing.html