测试numpy数组中的每个元素是否位于两个值之间的简便方法? [英] Easy way to test if each element in an numpy array lies between two values?

问题描述

我想知道是否有一种语法上简单的方法来检查numpy数组中的每个元素是否位于两个数字之间.

I was wondering if there was a syntactically simple way of checking if each element in a numpy array lies between two numbers.

换句话说，就像numpy.array([1,2,3,4,5]) < 5将返回array([True, True, True, True, False])一样，我想知道是否可以做与此类似的事情:

In other words, just as numpy.array([1,2,3,4,5]) < 5 will return array([True, True, True, True, False]), I was wondering if it was possible to do something akin to this:

1 < numpy.array([1,2,3,4,5]) < 5

...获得...

array([False, True, True, True, False])

我知道我可以通过布尔测试的逻辑链接来获得此信息，但是我正在研究一些相当复杂的代码，我一直在寻找语法上干净的解决方案.

I understand that I can obtain this through logical chaining of boolean tests, but I'm working through some rather complex code and I was looking for a syntactically clean solution.

有什么提示吗?

推荐答案

一种解决方案是:

a = numpy.array([1,2,3,4,5])
(a > 1).all() and (a < 5).all()

如果要使用真值的摘要数组，请使用:

if you want the acutal array of truth vaues, just use:

(a > 1) & (a < 5)

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