在范围内重新分类python中的numpy数组

Question

我在Python中有一个numpy数组，我需要在一系列值（＆gt; = 2到＆lt; 5 = 100）之间进行分类。我收到了错误消息，但我不理解a.any() or a.all()

的用法

    import numpy as np
    myarray = np.array([[1,2,3,4,5],[1,2,3,4,5],[1,2,3,4,5]])
    myarray[myarray >= 2 and myarray < 5] = 100

    Traceback (most recent call last):
          File "<input>", line 1, in <module>
        ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

Answer 1

你太近了。

>>> myarray[(myarray >= 2) & (myarray < 5)] = 100
>>> myarray
array([[  1, 100, 100, 100,   5],
       [  1, 100, 100, 100,   5],
       [  1, 100, 100, 100,   5]])