| scale_alpha {ggplot2} | R Documentation |
Alpha scale for continuous variable
scale_alpha(name=NULL, limits=NULL, breaks=NULL, labels=NULL, trans=NULL, to=c(0.1, 1), ...)
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 |
... |
ignored |
This page describes scale_alpha, see layer and qplot for how to create a complete plot from individual components.
A layer
Hadley Wickham, http://had.co.nz/
scale_discrete: Discrete position scales
## 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)