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cumsum only for certain group ID...

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Cumulative count of column based on Month...

Use pandas.groupby() and cumsum() with row wise condition check and replacement...

Calculate cumulative sum (cumsum) by group...

Cumulative sum while a condition is met with NA...

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cumsum with a condition to restart in R...

Group according to cumulative sums...

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Calculation of the cumulative points before the event/game...

Count rows with positive values and reset if negative...

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Cumulative sum based on a boolean...

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R loop until condition matched, then go on...