#CURD

import numpy as np

data1 = np.array([1,2,3,4,5])

print(data1)

data2 = np.array([[1,2],

                  [3,4]])

print(data2)

#维度

print(data1.shape,data2.shape)

# zero ones 空矩阵 单位矩阵

print(np.zeros([2,3]),np.ones([2,2]))

# 改查

data2[1,0] = 5

print(data2)

print(data2[1,1])

# 基本运算

data3 = np.ones([2,3])

print(data3*2)# 对应相乘

print(data3/3)

print(data3+2)

# 矩阵+*

data4 = np.array([[1,2,3],[4,5,6]])

print(data3+data4)

print(data3*data4)