[英]Pandas Pivot_Table defined function aggfunc
我試圖將自定義聚合函數應用於數據透視表,但始終收到KeyError:'PayoffUPB'。 這是aggfunc的語法問題,還是我需要在這里使用lambda函數? 感謝您的幫助。
import pandas as pd
df = pd.DataFrame([201801,201801,201801,201802,201802,201802,201803,201803,201803], columns=['Month'])
df['Program'] = ['a','b','c','a','b','c','a','b','c']
df['UPB'] = [1000000,1200000,1500000,1300000,1400000,1400000,1000000,1600000,1250000]
df['PayoffUPB'] = [50000,60000,30000,35000,40000,50000,65000,45000,25000]
print(df)
def CPR(x):
result = 100*(1-(1-x['PayoffUPB'].sum()/x['UPB'].sum())**12)
return result
df.pivot_table(index='Month',columns='Program',aggfunc=CPR)
我們可以使用groupby
與unstack
df.groupby(['Month','Program']).apply(CPR).unstack()
Out[310]:
Program a b c
Month
201801 45.963991 45.963991 21.528328
201802 27.928082 29.379551 35.364845
201803 55.358443 28.989114 21.528328
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