This set of scales defines new size scales for edge geoms equivalent to the
ones already defined by ggplot2. See `ggplot2::scale_size()`

for
more information. The different geoms will know whether to use edge scales or
the standard scales so it is not necessary to write `edge_size`

in
the call to the geom - just use `size`

.

```
scale_edge_size_continuous(
name = waiver(),
breaks = waiver(),
labels = waiver(),
limits = NULL,
range = c(1, 6),
trans = "identity",
guide = "legend"
)
scale_edge_radius(
name = waiver(),
breaks = waiver(),
labels = waiver(),
limits = NULL,
range = c(1, 6),
trans = "identity",
guide = "legend"
)
scale_edge_size(
name = waiver(),
breaks = waiver(),
labels = waiver(),
limits = NULL,
range = c(1, 6),
trans = "identity",
guide = "legend"
)
scale_edge_size_discrete(...)
scale_edge_size_binned(
name = waiver(),
breaks = waiver(),
labels = waiver(),
limits = NULL,
range = c(1, 6),
n.breaks = NULL,
nice.breaks = TRUE,
trans = "identity",
guide = "bins"
)
scale_edge_size_area(..., max_size = 6)
scale_edge_size_binned_area(..., max_size = 6)
scale_edge_size_manual(..., values, breaks = waiver(), na.value = NA)
scale_edge_size_identity(..., guide = "none")
```

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

`waiver()`

, the default, the name of the scale is taken from the first mapping used for that aesthetic. If`NULL`

, the legend title will be omitted.- 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 (e.g., a function returned by

`scales::extended_breaks()`

). Also accepts rlang lambda function notation.

- 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`

)An expression vector (must be the same length as breaks). See ?plotmath for details.

A function that takes the breaks as input and returns labels as output. Also accepts rlang lambda function notation.

- limits
One of:

`NULL`

to use the default scale rangeA numeric vector of length two providing limits of the scale. Use

`NA`

to refer to the existing minimum or maximumA function that accepts the existing (automatic) limits and returns new limits. Also accepts rlang lambda function notation. Note that setting limits on positional scales will

**remove**data outside of the limits. If the purpose is to zoom, use the limit argument in the coordinate system (see`coord_cartesian()`

).

- range
a numeric vector of length 2 that specifies the minimum and maximum size of the plotting symbol after transformation.

- trans
For continuous scales, the name of a transformation object or the object itself. Built-in transformations include "asn", "atanh", "boxcox", "date", "exp", "hms", "identity", "log", "log10", "log1p", "log2", "logit", "modulus", "probability", "probit", "pseudo_log", "reciprocal", "reverse", "sqrt" and "time".

A transformation object bundles together a transform, its inverse, and methods for generating breaks and labels. Transformation objects are defined in the scales package, and are called

`<name>_trans`

(e.g.,`scales::boxcox_trans()`

). You can create your own transformation with`scales::trans_new()`

.- guide
A function used to create a guide or its name. See

`guides()`

for more information.- ...
Arguments passed on to

`continuous_scale`

`minor_breaks`

One of:

`oob`

One of:

Function that handles limits outside of the scale limits (out of bounds). Also accepts rlang lambda function notation.

The default (

`scales::censor()`

) replaces out of bounds values with`NA`

.`scales::squish()`

for squishing out of bounds values into range.`scales::squish_infinite()`

for squishing infinite values into range.

`na.value`

Missing values will be replaced with this value.

`expand`

For position scales, a vector of range expansion constants used to add some padding around the data to ensure that they are placed some distance away from the axes. Use the convenience function

`expansion()`

to generate the values for the`expand`

argument. The defaults are to expand the scale by 5% on each side for continuous variables, and by 0.6 units on each side for discrete variables.`position`

For position scales, The position of the axis.

`left`

or`right`

for y axes,`top`

or`bottom`

for x axes.`super`

The super class to use for the constructed scale

- n.breaks
An integer guiding the number of major breaks. The algorithm may choose a slightly different number to ensure nice break labels. Will only have an effect if

`breaks = waiver()`

. Use`NULL`

to use the default number of breaks given by the transformation.- nice.breaks
Logical. Should breaks be attempted placed at nice values instead of exactly evenly spaced between the limits. If

`TRUE`

(default) the scale will ask the transformation object to create breaks, and this may result in a different number of breaks than requested. Ignored if breaks are given explicitly.- max_size
Size of largest points.

- values
a set of aesthetic values to map data values to. The values will be matched in order (usually alphabetical) with the limits of the scale, or with

`breaks`

if provided. If this is a named vector, then the values will be matched based on the names instead. Data values that don't match will be given`na.value`

.- na.value
The aesthetic value to use for missing (

`NA`

) values

A ggproto object inheriting from `Scale`

In ggplot2 size conflates both line width and point size into one
scale. In ggraph there is also a width scale (`scale_edge_width()`

)
that is used for linewidth. As edges are often represented by lines the width
scale is the most common.

Other scale_edge_*:
`scale_edge_alpha()`

,
`scale_edge_colour`

,
`scale_edge_fill`

,
`scale_edge_linetype()`

,
`scale_edge_shape()`

,
`scale_edge_width()`

,
`scale_label_size()`