Description Usage Arguments See Also Examples
scale_size
scales area, scale_radius
scales radius. The size
aesthetic is most commonly used for points and text, and humans perceive
the area of points (not their radius), so this provides for optimal
perception. scale_size_area
ensures that a value of 0 is mapped
to a size of 0.
1 2 3 4 5 6 7  scale_radius(name = waiver(), breaks = waiver(), labels = waiver(),
limits = NULL, range = c(1, 6), trans = "identity", guide = "legend")
scale_size(name = waiver(), breaks = waiver(), labels = waiver(),
limits = NULL, range = c(1, 6), trans = "identity", guide = "legend")
scale_size_area(..., max_size = 6)

name 
The name of the scale. Used as axis or legend title. If

breaks 
One of:

labels 
One of:

limits 
A numeric vector of length two providing limits of the scale.
Use 
range 
a numeric vector of length 2 that specifies the minimum and maximum size of the plotting symbol after transformation. 
trans 
Either the name of a transformation object, or the object itself. Builtin transformations include "asn", "atanh", "boxcox", "exp", "identity", "log", "log10", "log1p", "log2", "logit", "probability", "probit", "reciprocal", "reverse" and "sqrt". A transformation object bundles together a transform, it's inverse,
and methods for generating breaks and labels. Transformation objects
are defined in the scales package, and are called 
guide 
A function used to create a guide or its name. See

... 
Arguments passed on to

max_size 
Size of largest points. 
scale_size_area()
if you want 0 values to be mapped
to points with size 0.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16  p < ggplot(mpg, aes(displ, hwy, size = hwy)) +
geom_point()
p
p + scale_size("Highway mpg")
p + scale_size(range = c(0, 10))
# If you want zero value to have zero size, use scale_size_area:
p + scale_size_area()
# This is most useful when size is a count
ggplot(mpg, aes(class, cyl)) +
geom_count() +
scale_size_area()
# If you want to map size to radius (usually bad idea), use scale_radius
p + scale_radius()

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