gg-add: Add components to a plot

Description Usage Arguments What can you add? See Also Examples

Description

+ is the key to constructing sophisticated ggplot2 graphics. It allows you to start simple, then get more and more complex, checking your work at each step.

Usage

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## S3 method for class 'gg'
e1 + e2

e1 %+% e2

Arguments

e1

An object of class ggplot() or a theme().

e2

A plot component, as described below.

What can you add?

You can add any of the following types of objects:

To replace the current default data frame, you must use %+%, due to S3 method precedence issues.

You can also supply a list, in which case each element of the list will be added in turn.

See Also

theme()

Examples

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base <- ggplot(mpg, aes(displ, hwy)) + geom_point()
base + geom_smooth()

# To override the data, you must use %+%
base %+% subset(mpg, fl == "p")

# Alternatively, you can add multiple components with a list.
# This can be useful to return from a function.
base + list(subset(mpg, fl == "p"), geom_smooth())

hadley/ggplot2 documentation built on Feb. 14, 2018, 5:22 a.m.