scale_size {ggplot2} | R Documentation |
Size scale for continuous variable
scale_size(name=NULL, limits=NULL, breaks=NULL, labels=NULL, trans=NULL, to=c(1, 6), ...)
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_size, see layer
and qplot
for how to create a complete plot from individual components.
A layer
Hadley Wickham, http://had.co.nz/
scale_manual
: for sizing discrete variables
## Not run: (p <- qplot(mpg, cyl, data=mtcars, size=cyl)) p + scale_size("cylinders") p + scale_size("number\nof\ncylinders") p + scale_size(to = c(0, 10)) p + scale_size(to = c(1, 2)) # Map area, instead of width/radius # Perceptually, this is a little better p + scale_area() p + scale_area(to = c(1, 25)) # Also works with factors, but not a terribly good # idea, unless your factor is ordered, as in this example qplot(mpg, cyl, data=mtcars, size=factor(cyl)) # To control the size mapping for discrete variable, use # scale_size_manual: last_plot() + scale_size_manual(values=c(2,4,6)) ## End(Not run)