R: Edge width scales

scale_edge_width {ggraph} | R Documentation

## Edge width scales

### Description

This set of scales defines width scales for edge geoms. Of all the new edge scales defined in ggraph, this is the only one not having an equivalent in ggplot2. In essence it mimicks the use of size in `geom_line` and related. As almost all edge representations are lines of some sort, edge_width will be used much more often than edge_size. It is not necessary to spell out that it is an edge scale as the geom knows if it is drawing an edge. Just write `width` and not `edge_width` in the call to geoms.

### Usage

    scale_edge_width_continuous(..., range = c(1, 6))

    scale_edge_width(..., range = c(1, 6))

    scale_edge_width_discrete(..., range = c(2, 6))

    scale_edge_width_manual(..., values)

    scale_edge_width_identity(..., guide = "none")

### Arguments

`...` | Arguments passed on to `continuous_scale` name The name of the scale. Used as 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 object A numeric vector of positions A function that takes the limits as input and returns breaks as output minor_breaks One of: `NULL` for no minor breaks `waiver()` for the default breaks (one minor break between each major break) A numeric vector of positions A function that given the limits returns a vector of minor breaks. labels One of: `NULL` for no labels `waiver()` for the default labels computed by the transformation object A 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. oob Function that handles limits outside of the scale limits (out of bounds). The default replaces out of bounds values with NA. na.value Missing values will be replaced with this value. 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. `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 info. position The position of the axis. "left" or "right" for vertical scales, "top" or "bottom" for horizontal scales super The super class to use for the constructed scale expand 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 `expand_scale()` 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.
`range` | a numeric vector of length 2 that specifies the minimum and maximum size of the plotting symbol after transformation.
`values` | a set of aesthetic values to map data values to. If this is a named vector, then the values will be matched based on the names. If unnamed, values will be matched in order (usually alphabetical) with the limits of the scale. Any data values that don't match will be given `na.value`.
`guide` | A function used to create a guide or its name. See `guides()` for more info.

### Value

A ggproto object inheriting from `Scale`

### See Also

Other scale_edge_*: `scale_edge_alpha`, `scale_edge_colour`, `scale_edge_fill`, `scale_edge_linetype`, `scale_edge_shape`, `scale_edge_size`, `scale_label_size`

[Package ggraph version 1.0.2 Index]