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GroupBy

GroupBy objects are returned by groupby calls: koalas.DataFrame.groupby(), koalas.Series.groupby(), etc.

Function application

GroupBy.agg(self, func_or_funcs, \*args, …) Aggregate using one or more operations over the specified axis.
GroupBy.aggregate(self, func_or_funcs, …) Aggregate using one or more operations over the specified axis.

Computations / Descriptive Stats

GroupBy.count(self) Compute count of group, excluding missing values.
GroupBy.first(self) Compute first of group values.
GroupBy.last(self) Compute last of group values.
GroupBy.max(self) Compute max of group values.
GroupBy.mean(self) Compute mean of groups, excluding missing values.
GroupBy.min(self) Compute min of group values.
GroupBy.std(self) Compute standard deviation of groups, excluding missing values.
GroupBy.sum(self) Compute sum of group values
GroupBy.var(self) Compute variance of groups, excluding missing values.
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