gggroup {ggplot}R Documentation

Grob function: groups

Description

Create multiple of grobs based on id aesthetic.

Usage

gggroup(plot = .PLOT, aesthetics=list(), ..., data=NULL)

Arguments

plot the plot object to modify
aesthetics named list of aesthetic mappings, see details for more information
... other options, see details for more information
data data source, if not specified the plot default will be used

Details

This grob function provides a general means of creating multiple grobs based on groups in the data. This is useful if you want to fit a separate smoother for each group in the data.

You will need an id variable in your aesthetics list with determines how the data is broken down.

Aesthetic mappings that this grob function understands:

These can be specified in the plot defaults (see ggplot) or in the aesthetics argument. If you want to modify the position of the points or any axis options, you will need to add a position scale to the plot. These functions start with ps, eg. pscontinuous or pscategorical

Other options:

Author(s)

Hadley Wickham <h.wickham@gmail.com>

Examples

p <- ggplot(mtcars, aesthetics=list(y=wt, x=qsec, id=cyl, colour=cyl))
gggroup(p)
gggroup(p, grob="density")
gggroup(p, grob="histogram", aes=list(fill=cyl))
gggroup(ggpoint(p), grob="smooth", se=FALSE, span=1)
gggroup(ggpoint(p), aes=list(id=cyl, size=cyl), grob="smooth", span=1)

[Package ggplot version 0.4.2 Index]