ggalluvial: geom_lode – R documentation

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geom_lode

Lodes at intersections of alluvia and strata

Description

geom_alluvium receives a dataset of the horizontal (x) and vertical (y, ymin, ymax) positions of the lodes of an alluvial plot, the intersections of the alluvia with the strata. It plots rectangles for these lodes of a provided width.

Usage

geom_lode(
  mapping = NULL,
  data = NULL,
  stat = "alluvium",
  position = "identity",
  width = 1/3,
  na.rm = FALSE,
  show.legend = NA,
  inherit.aes = TRUE,
  ...
)

Arguments

`mapping`	Set of aesthetic mappings created by `aes()` or `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; override the default.
`position`	Position adjustment, either as a string, or the result of a call to a position adjustment function.
`width`	Numeric; the width of each stratum, as a proportion of the distance between axes. Defaults to 1/3.
`na.rm`	Logical: if `FALSE`, the default, `NA` lodes are not included; if `TRUE`, `NA` lodes constitute a separate category, plotted in grey (regardless of the color scheme).
`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()`.
`...`	Additional arguments passed to `ggplot2::layer()`.

Aesthetics

geom_alluvium, geom_flow, geom_lode, and geom_stratum understand the following aesthetics (required aesthetics are in bold):

x
y
ymin
ymax
alpha
colour
fill
linetype
size
group

group is used internally; arguments are ignored.

Defunct parameters

The previously defunct parameters axis_width and ribbon_bend have been discontinued. Use width and knot.pos instead.

Examples

# one axis
ggplot(as.data.frame(Titanic),
       aes(y = Freq,
           axis = Class)) +
  geom_lode(aes(fill = Class, alpha = Survived)) +
  scale_x_discrete(limits = c("Class")) +
  scale_alpha_manual(values = c(.25, .75))

gg <- ggplot(as.data.frame(Titanic),
             aes(y = Freq,
                 axis1 = Class, axis2 = Sex, axis3 = Age,
                 fill = Survived))
# alluvia and lodes
gg + geom_alluvium() + geom_lode()
# lodes as strata
gg + geom_alluvium() +
  geom_stratum(stat = "alluvium")

ggalluvial

Alluvial Plots in 'ggplot2'

v0.12.3

GPL-3

Authors

Jason Cory Brunson [aut, cre], Quentin D. Read [aut]

Initial release

2020-12-04