A grouped data frame.
The easiest way to create a grouped data frame is to call the group_by()
method on a data frame or tbl: this will take care of capturing
the unevaluated expressions for you.
These functions are designed for programmatic use. For data analysis
purposes see group_data() for the accessor functions that retrieve
various metadata from a grouped data frames.
grouped_df(data, vars, drop = group_by_drop_default(data)) is.grouped_df(x) is_grouped_df(x)
data |
a tbl or data frame. |
vars |
A character vector. |
drop |
When |
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