scale_alpha_continuous {ggplot2}R Documentation

scale_alpha_continuous

Description

Alpha scale for continuous variable

Usage

scale_alpha_continuous(name=NULL, limits=NULL, breaks=NULL, labels=NULL, trans=NULL, to=c(0.1, 1), legend=TRUE, ...)

Arguments

name name of scale to appear in legend or on axis. Maybe be an expression: see ?plotmath
limits numeric vector of length 2, giving the extent of the scale
breaks numeric vector indicating where breaks should lie
labels character vector giving labels associated with breaks
trans a transformer to use
to numeric vector of length 2, giving minimum and maximum after transformation
legend NULL
... ignored

Details

This page describes scale_alpha_continuous, see layer and qplot for how to create a complete plot from individual components.

Value

A layer

Author(s)

Hadley Wickham, http://had.co.nz/

See Also

Examples

## Not run: 
(p <- qplot(mpg, cyl, data=mtcars, alpha=cyl))
p + scale_alpha("cylinders")
p + scale_alpha("number\nof\ncylinders")

p + scale_alpha(to = c(0.4, 0.8))
## End(Not run)

[Package ggplot2 version 0.8.5 Index]