R: Show nodes as thick arcs

geom_node_arc_bar {ggraph} | R Documentation

## Show nodes as thick arcs

### Description

This geom is equivalent in functionality to `ggforce::geom_arc_bar()` and allows for plotting of nodes as arcs with an inner and outer radius scaled by the coordinate system. Its main use is currently in sunburst plots as created with circular partition layouts

### Usage

    geom_node_arc_bar(
      mapping = NULL,
      data = NULL,
      position = "identity",
      show.legend = NA,
      ...
    )

### Arguments

`mapping` | Set of aesthetic mappings created by `ggplot2::aes()` or `ggplot2::aes_()`. By default x and y are mapped to x0 and y0 in the node data.
`data` | The data to be displayed in this layer. There are three options: If `NULL`, the default, the data is inherited from the plot data as specified in the call to `ggplot()`. A `data.frame`, or other object, will override the plot data. All objects will be fortified to produce a data frame. See `fortify()` for which variables will be created. A `function` will be called with a single argument, the plot data. The return value must be a `data.frame`, and will be used as the layer data. A `function` can be created from a `formula` (e.g. `~ head(.x, 10)`).
`position` | Position adjustment, either as a string, or the result of a call to a position adjustment function.
`show.legend` | logical. Should this layer be included in the legends? `NA`, the default, includes if any aesthetics are mapped. `FALSE` never includes, and `TRUE` always includes. It can also be a named logical vector to finely select the aesthetics to display.
`...` | Other arguments passed on to `layer()`. These are often aesthetics, used to set an aesthetic to a fixed value, like `colour = "red"` or `size = 3`. They may also be parameters to the paired geom/stat.

### Aesthetics

`geom_node_point` understand the following aesthetics. Bold aesthetics are automatically set, but can be overridden.

- x0

- y0

- r0

- r

- start

- end

- alpha

- colour

- fill

- shape

- size

- stroke

- filter

### Author(s)

Thomas Lin Pedersen

### See Also

Other geom_node_*: `geom_node_circle()`, `geom_node_point()`, `geom_node_range()`, `geom_node_text()`, `geom_node_tile()`, `geom_node_voronoi()`

### Examples

    require(tidygraph)
    gr <- tbl_graph(flare$vertices, flare$edges)
    ggraph(gr, 'partition', circular = TRUE, weight = size) +
      geom_node_arc_bar()

[Package ggraph version 2.0.2 Index]