scale_alpha_continuous {ggplot2} | R Documentation |
Alpha scale for continuous variable
scale_alpha_continuous(name=NULL, limits=NULL, breaks=NULL, labels=NULL, trans=NULL, to=c(0.1, 1), legend=TRUE, ...)
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 |
This page describes scale_alpha_continuous, 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)