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[英]Python: How to populate Pandas column that depends on the previous value (previous row)?
[英]Generate a Column that depends on the previous value of that column scala/python
您可以使用函數.cumsum()
解決這個似乎具有累積性質的問題:
df['active customers t'] = (df['New Hirings'] - df['Cancelation']).cumsum()
輸出:
New Hirings Cancelations Cumulative Active Customers
0 1 1 0
1 1 0 1
2 2 0 3
3 2 0 5
4 5 1 9
5 0 1 8
6 7 0 15
7 2 3 14
8 0 2 12
9 2 1 13
另外,對於未來的問題,請嘗試將您的數據作為文本而不是圖片發布!
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