[英]Count number of trues in a numpy array in each row?
I have a numpy array and I want to return the count of true
values for each row. 我有一个numpy数组,我想返回每行的true
值的计数。
for example I have a numpy array: 例如,我有一个numpy数组:
[[False False False ..., False False False]
[False False False ..., False False False]
[False False False ..., False True False]
...,
[False False False ..., False False False]
[ True False True ..., True True True]
[False False False ..., False False False]]
and the return value should be like: 并且返回值应该是:
[10
15
8
...,
11
10
12]
This question asks about how to do it for the whole array but how do I do it for each row? 这个问题询问如何为整个数组执行此操作但是如何为每一行执行此操作?
我们可以通过为sum
函数提供一个axis
参数来做到这一点:
arr.sum(axis=1)
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