R: Text radiating outward from the origin

geom_text_radiate {ordr}

R Documentation

Text radiating outward from the origin

Description

geom_text_radiate() is adapted from ggbiplot() in the off-CRAN extensions of the same name (Vu, 2014; Telford, 2017; Gegzna, 2018). It renders text at specified positions and angles that radiate out from the origin.

Usage

geom_text_radiate(
  mapping = NULL,
  data = NULL,
  stat = "identity",
  position = "identity",
  ...,
  parse = FALSE,
  check_overlap = FALSE,
  na.rm = FALSE,
  show.legend = NA,
  inherit.aes = TRUE
)

Arguments

`mapping`	Set of aesthetic mappings created by `aes()`. If specified and `inherit.aes = TRUE` (the default), it is combined with the default mapping at the top level of the plot. You must supply `mapping` if there is no plot mapping.
`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)`).
`stat`	The statistical transformation to use on the data for this layer, either as a `ggproto` `Geom` subclass or as a string naming the stat stripped of the `stat_` prefix (e.g. `"count"` rather than `"stat_count"`)
`position`	Position adjustment, either as a string, or the result of a call to a position adjustment function. Cannot be jointy specified with `nudge_x` or `nudge_y`.
`...`	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.
`parse`	If `TRUE`, the labels will be parsed into expressions and displayed as described in `?plotmath`.
`check_overlap`	If `TRUE`, text that overlaps previous text in the same layer will not be plotted. `check_overlap` happens at draw time and in the order of the data. Therefore data should be arranged by the label column before calling `geom_text()`. Note that this argument is not supported by `geom_label()`.
`na.rm`	If `FALSE`, the default, missing values are removed with a warning. If `TRUE`, missing values are silently removed.
`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.
`inherit.aes`	If `FALSE`, overrides the default aesthetics, rather than combining with them. This is most useful for helper functions that define both data and aesthetics and shouldn't inherit behaviour from the default plot specification, e.g. `borders()`.

Value

A ggproto layer.

Biplot layers

ggbiplot() uses ggplot2::fortify() internally to produce a single data frame with a .matrix column distinguishing the subjects ("rows") and variables ("cols"). The stat layers stat_rows() and stat_cols() simply filter the data frame to one of these two.

The geom layers ⁠geom_rows_*()⁠ and ⁠geom_cols_*()⁠ call the corresponding stat in order to render plot elements for the corresponding factor matrix. ⁠geom_dims_*()⁠ selects a default matrix based on common practice, e.g. points for rows and arrows for columns.

Aesthetics

geom_text_radiate() understands the following aesthetics (required aesthetics are in bold):

x
y
label
alpha
angle
colour
family
fontface
hjust
lineheight
size
vjust
group

References

Vincent Q. Vu (2014). ggbiplot: A 'ggplot2' based biplot. R package version 0.55. https://github.com/vqv/ggbiplot, experimental branch

Richard J Telford (2017). ggbiplot: A 'ggplot2' based biplot. R package version 0.6. https://github.com/richardjtelford/ggbiplot (fork), experimental branch

Vilmantas Gegzna (2018). ggbiplot: A 'ggplot2' based biplot. R package version 0.55. https://github.com/forked-packages/ggbiplot (fork), experimental branch