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Simplify usage of aggregation functions as window functions without group_by verb #17

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QuantCo-mr-T opened this issue Aug 19, 2023 · 0 comments
Open

Simplify usage of aggregation functions as window functions without group_by verb #17

QuantCo-mr-T opened this issue Aug 19, 2023 · 0 comments
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@QuantCo-mr-T
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Modifying the partition-by section of an over-clause is currently only possible with group_by/ungroup:

tbl >> group_by(a,b,c) >> mutate(agg_col=tbl.x.max()) >> ungroup() >> mutate(y=tbl.x - λ.agg_col)

It would be much nicer to configure this the same way as the order-by part of window functions:

tbl >> mutate(y=tbl.x - tbl.x.max(grouped=[a,b,c]))
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@QuantCo-mr-T @windiana42