`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.

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

`NULL`

, the default, the name of the scale is taken from the first mapping used for that aesthetic.- breaks
One of:

`NULL`

for no breaks`waiver()`

for the default breaks computed by the transformation objectA numeric vector of positions

A function that takes the limits as input and returns breaks as output

- labels
One of:

`NULL`

for no labels`waiver()`

for the default labels computed by the transformation objectA character vector giving labels (must be same length as

`breaks`

)A function that takes the breaks as input and returns labels as output

- limits
A numeric vector of length two providing limits of the scale. Use

`NA`

to refer to the existing minimum or maximum.- 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. Built-in 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

`name_trans`

, e.g.`boxcox_trans`

. You can create your own transformation with`trans_new`

.- guide
Name of guide object, or object itself.

- ...
Other arguments passed on to

`continuous_scale`

to control name, limits, breaks, labels and so forth.- max_size
Size of largest points.

`scale_size_area`

if you want 0 values to be mapped
to points with size 0.

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()