Numpy常用函数

import numpy as np B=np.arange(3) print(B) print(np.exp(B)) print(np.sqrt(B)) exp的意思 e的多少次幂 e^0=1 e^1=2.71828.. e^2=7.389… sqrt=开方 [0 1 2] [ 1. 2.71828183 7.3890561 ] [ 0. 1. 1.41421356] np.floor 向下取整

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