1
我有透视表创建加入2个数据帧,重叠的数据
import pandas as pd
import matplotlib.pyplot as plt
import numpy as np
df=pd.DataFrame({'axis1': ['Unix','Window','Apple','Linux'],
'A': [1,np.nan,1,1],
'B': [1,np.nan,np.nan,1],
'C': [np.nan,1,np.nan,1],
'D': [1,np.nan,1,np.nan],
}).set_index(['axis1'])
print (df)
df2=pd.DataFrame({'axis1': ['Unix','Window','Apple','Linux','A'],
'A': [1,1,np.nan,np.nan,np.nan],
'E': [1,np.nan,1,1,1],
}).set_index(['axis1'])
print (df2)
输出2数据帧看起来像这样
A B C D
axis1
Unix 1 1 NaN 1
Window NaN NaN 1 NaN
Apple 1 NaN NaN 1
Linux 1 1 1 NaN
[4 rows x 4 columns]
A E
axis1
Unix 1 1
Window 1 NaN
Apple NaN 1
Linux NaN 1
A NaN 1
可以说,我想将它们合并,但我只是想要值1 到目前为止,我得到了它,但它不具有E列或行答:
>>> df.update(df2)
>>> df
A B C D
axis1
Unix 1 1 NaN 1
Window 1 NaN 1 NaN
Apple 1 NaN NaN 1
Linux 1 1 1 NaN
[4 rows x 4 columns]
会如何我更新它来获得额外的轴值? (包括A行和列E)