array索引和切片

一、和标量进行运算

import numpy as np
a = np.arange(10)
print(a)
b = a +1
print(b)

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二、两个二维数组进行运算（前提：大小一致）

import numpy as np
a = np.arange(10)
print("a是：",a)

c = np.arange(10,20)
print("c是：",c)
d = a * c
print("a与c相乘的结果是:",d)

e = d > a
print(e)

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ede jieguo

三、一维与二维数组取值

import numpy as np
c = np.arange(10,20)
print("一维数组取值：",c[0])
f = np.arange(15).reshape((3,5))
print(f)
print("二维数组取值：",f[0,0])

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四、切片

f = np.arange(15).reshape((3,5))
print(f)
print("二维数组切片：","\n",f[0:2,0:2])

image.png