dplyr (version 0.3)

grouped_df: A grouped data frame.

Description

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 unevalated expressions for you.

Usage

grouped_df(data, vars, drop = TRUE)

is.grouped_df(x)

Arguments

data
a tbl or data frame.
vars
a list of quoted variables.
drop
if TRUE preserve all factor levels, even those without data.