A grouped data frame.

Source: R/grouped-df.r

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.

grouped_df(data, vars, drop = FALSE)

is.grouped_df(x)

is_grouped_df(x)

Arguments

data

a tbl or data frame.
vars

a character vector or a list of name()
drop

When .drop = TRUE, empty groups are dropped.