geom_parallel_sets_labs: Add nudged labels in a parallel sets diagram

In ycl6/scRUtils: Single-Cell Sequencing Analysis Utilities

Add nudged labels in a parallel sets diagram

Description

This is the same function as geom_parallel_sets_labels() from the ggforce package but with the ability to nudge labels at a fixed distance. It is especially useful when the labels are too long to fit inside the bars depicting the discrete categories.

Usage

geom_parallel_sets_labs(
  mapping = NULL,
  data = NULL,
  stat = "parallel_sets_axes",
  position = "identity",
  parse = FALSE,
  nudge_x = 0,
  nudge_y = 0,
  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	A string indicating the statistical transformation to use on the data for this layer. Default is "parallel_sets_axes".
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.
parse	If TRUE, the labels will be parsed into expressions and displayed as described in grDevices::plotmath(). Default is FALSE.
nudge_x, nudge_y	Horizontal and vertical adjustment to nudge labels by. Useful for offsetting text from points, particularly on discrete scales. Cannot be jointly specified with position.
check_overlap	If TRUE, text that overlaps previous text in the same layer will not be plotted.
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().
...	Other arguments passed on to layer().

Details

A pull request of the nudge enhancement has been submitted to the ggforce's GitHub repository, https://github.com/thomasp85/ggforce/pull/260, added in v0.3.4.

Value

A layer object

Author(s)

I-Hsuan Lin

See Also

ggforce::geom_parallel_sets_labels(), ggplot2::layer()

Examples

library(ggforce)
data <- as.data.frame(Titanic)
data <- gather_set_data(data, 1:4)

# Use nudge_x to offset and hjust = 0 to left-justify label
ggplot(data, aes(x, id = id, split = y, value = Freq)) +
  geom_parallel_sets(aes(fill = Sex), alpha = 0.3, axis.width = 0.1) +
  geom_parallel_sets_axes(axis.width = 0.1) +
  geom_parallel_sets_labs(colour = "red", angle = 0, nudge_x = 0.1, hjust = 0)

ycl6/scRUtils documentation built on Feb. 18, 2025, 6:14 a.m.