numpy array.A的内置函数A是什么? [英] What is the built-in function A of numpy array.A?

问题描述

最近我读了一行使我感到困惑的代码:

Recently I read a line of code that confused me:

pointsInCurrCluster = dataSet[nonzero(clusterAssment[:, 0].A == i)[0], :]  

作者没有为A定义函数，因此我认为.A是某种内置函数.有人知道这是什么吗?

The author did not define the function for A, so I assume that .A is some kind of built-in function. Does anyone know what it is?

推荐答案

好，所以我认为这是scipy矩阵的支持者，返回nparray:

Ok, so in this way I think its is proparty of scipy matrix returning nparray:

In [115]: mtx = sp.matrix([1,2,3])    
In [116]: mtx.A
Out[116]: array([[1, 2, 3]])

A是 getA .

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