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group_trim
Trim grouping structure
Description
![[Experimental]](../help/figures/lifecycle-experimental.svg)
Drop unused levels of all factors that are used as grouping variables,
then recalculates the grouping structure.
group_trim() is particularly useful after a filter() that is intended
to select a subset of groups.
Usage
group_trim(.tbl, .drop = group_by_drop_default(.tbl))
Arguments
.tbl |
|
.drop |
See |
Value
See Also
Other grouping functions:
group_by(),
group_map(),
group_nest(),
group_split()
Examples
iris %>% group_by(Species) %>% filter(Species == "setosa", .preserve = TRUE) %>% group_trim()