[英]How replace values from one numpy array by other array with indices
I have two arrays and one list with indices我有两个 arrays 和一个带索引的列表
Array source (array 01):阵列源(阵列01):
x = np.array([[1,2,3], [4,5,6], [7,8,9]])
array([[1, 2, 3],
[4, 5, 6],
[7, 8, 9]])
Array with new values (array 02):具有新值的数组(数组 02):
y = np.array([11, 22, 33])
array([11, 22, 33])
and a list with indices和一个索引列表
a = [1,2,1]
[1, 2, 1]
I need to replace the values of array 02 in array 01 based on indices我需要根据索引替换数组 01 中数组 02 的值
The return expected:预期回报:
array([[1, 11, 3],
[4, 5, 22],
[7, 33, 9]])
How to do this without loop?如何在没有循环的情况下做到这一点?
Thanks in advance.提前致谢。
Tryadvanced indexing :尝试高级索引:
x[np.arange(len(x)), a] = y
I found also this tutorial easier for me than official documentation.我还发现本教程对我来说比官方文档更容易。
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