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ggplot2 (version 2.2.1)

combine_vars: Take input data and define a mapping between facetting variables and ROW, COL and PANEL keys

Description

Take input data and define a mapping between facetting variables and ROW, COL and PANEL keys

Usage

combine_vars(data, env = emptyenv(), vars = NULL, drop = TRUE)

Arguments

data
A list of data.frames, the first being the plot data and the subsequent individual layer data
env
The environment the vars should be evaluated in
vars
A list of quoted symbols matching columns in data
drop
should missing combinations/levels be dropped

Value

A data.frame with columns for PANEL, ROW, COL, and facetting vars