scale_alpha {ggplot2} | R Documentation |
scale_alpha
is an alias for
scale_alpha_continuous
since that is the most
common use of alpha, and it saves a bit of typing.
scale_alpha(..., range = c(0.1, 1)) scale_alpha_continuous(..., range = c(0.1, 1)) scale_alpha_discrete(..., range = c(0.1, 1))
... |
Other arguments passed on to
|
range |
range of output alpha values. Should lie between 0 and 1. |
(p <- qplot(mpg, cyl, data = mtcars, alpha = cyl)) p + scale_alpha("cylinders") p + scale_alpha("number\nof\ncylinders") p + scale_alpha(range = c(0.4, 0.8)) (p <- qplot(mpg, cyl, data=mtcars, alpha = factor(cyl))) p + scale_alpha_discrete(range = c(0.4, 0.8))