python - Get original values from cumulative sum -

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>>> test.val.cumsum() 0    11 1    13 2    56 3    60 4    65 name: val, dtype: int64

how original values cumulative sum? have [11,2,43,4,5]

you use diff() series method (with fillna replace first value in series):

>>> s = pd.series([11, 13, 56, 60, 65]) >>> s.diff().fillna(s) 0    11 1     2 2    43 3     4 4     5 dtype: float64

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