GROUPBY function
Summarize values by one or more grouping fields.
Group selected source records with a named aggregation or local LAMBDA. The eighth field_relationship argument chooses hierarchy (0/default) or table (1). Hierarchy sorting stays within parent groups and automatic totals include available subtotals; table sorting orders complete keys globally and supports grand totals only. Examples also cover signed sums, means, reducer vectors, headers and measure sorting. Native Excel recalculation and complete layout/coercion parity remain unverified.
Syntax
GROUPBY(row_fields, values, function, [field_headers], [total_depth], [sort_order], [filter_array], [field_relationship])Square brackets indicate optional arguments.
Arguments
| Argument | Required | Meaning |
|---|---|---|
| row_fields | Yes | Column or columns whose values define row groups. |
| values | Yes | Numeric data to summarize, aligned with the grouping fields. |
| function | Yes | The aggregation function or LAMBDA used for each group. |
| field_headers | No | Controls whether input headers exist and whether headers are returned. |
| total_depth | No | Controls the depth of subtotals and grand totals in the grouped result. |
| sort_order | No | Controls the grouping or value columns used to order the result. |
| filter_array | No | A Boolean filter aligned with source records; only included records are summarized. |
| field_relationship | No | Controls whether multiple grouping fields are treated hierarchically or as separate fields. |
Try GROUPBY
Average each selected group over its original observations
=GROUPBY(A2:A6,B2:B6,AVERAGE,0,0,1,C2:C6="Posted")AMBER has two selected observations, 6 and -2, giving mean 2. BLUE has one actual zero, giving mean 0. The excluded rows do not enter the counts or introduce groups.
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GROUPBY · top-level call
=GROUPBY(A2:A6,B2:B6,AVERAGE,0,0,1,C2:C6="Posted")Follow the cells behind a result
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