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Plot a General R to R Function with Optional Shading

Source: R/geom_function_1d_1d.R
geom_function_1d_1d.Rd

geom_function_1d_1d() computes a function \(f: \mathbb{R} \to \mathbb{R}\) and plots it as a line (like ggplot2::geom_function()) with an optional shaded region between two x-values.

Usage

geom_function_1d_1d(
  mapping = NULL,
  data = NULL,
  stat = StatFunction1d,
  position = "identity",
  ...,
  na.rm = FALSE,
  show.legend = NA,
  inherit.aes = FALSE,
  fun,
  xlim = NULL,
  n = 101,
  args = list(),
  fill = "grey20",
  color = "black",
  shade_from = NULL,
  shade_to = NULL
)

StatFunction1d

GeomFunction1d

Format

An object of class StatFunction1d (inherits from Stat, ggproto, gg) of length 3.

An object of class GeomFunction1d (inherits from GeomPath, Geom, ggproto, gg) of length 3.

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

Ignored by stat_function(), do not use.

stat

The statistical transformation to use on the data for this layer. When using a geom_*() function to construct a layer, the stat argument can be used to override the default coupling between geoms and stats. The stat argument accepts the following:

  • A Stat ggproto subclass, for example StatCount.

  • A string naming the stat. To give the stat as a string, strip the function name of the stat_ prefix. For example, to use stat_count(), give the stat as "count".

  • For more information and other ways to specify the stat, see the layer stat documentation.

position

A position adjustment to use on the data for this layer. This can be used in various ways, including to prevent overplotting and improving the display. The position argument accepts the following:

  • The result of calling a position function, such as position_jitter(). This method allows for passing extra arguments to the position.

  • A string naming the position adjustment. To give the position as a string, strip the function name of the position_ prefix. For example, to use position_jitter(), give the position as "jitter".

  • For more information and other ways to specify the position, see the layer position documentation.

...

Other parameters passed on to ggplot2::layer().

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. To include legend keys for all levels, even when no data exists, use TRUE. If NA, all levels are shown in legend, but unobserved levels are omitted.

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. annotation_borders().

fun

A function to compute. The function must accept a numeric vector as its first argument.

xlim

A numeric vector of length 2 giving the x-range over which to evaluate the function.

n

Number of points at which to evaluate fun. Defaults to 101.

args

A named list of additional arguments to pass to fun.

fill

Fill color for the shaded area (only used when shade_from/shade_to are specified).

color

Line color for the curve.

shade_from

(Optional) Numeric. Left boundary of the x-interval to shade.

shade_to

(Optional) Numeric. Right boundary of the x-interval to shade.

Value

A ggplot2 layer.

Examples

  ggplot() +
    geom_function_1d_1d(fun = sin, xlim = c(0, 2 * pi))


  ggplot() +
    geom_function_1d_1d(fun = dnorm, xlim = c(-3, 3),
      shade_from = -1, shade_to = 1)