pandas对齐运算的实现示范

目录

1.算术运算和数据对齐1.1 Series

1.2 DataFrame

2.使用填充值的算术方法2.1 Series

2.2 DataFrame

3.DataFrame和Series混合运算3.1 按行广播

3.2 按列广播

1.算术运算和数据对齐

import numpy as np

import pandas as pd

1.1 Series

a1 = pd.Series(np.arange(4),index=['a','b','c','d'])

a2 = pd.Series(np.arange(5),index=['a','r','c','u','k'])

print(a1)

print("="*20)

print(a2)