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A null geom or 'no-op' geom.

Source: R/geom-debug.R
geom_null.Rd

The null geom can be used to silence graphic output from a stat, such as stat_debug_group() and stat_debug_panel() defined in this same package. No visible graphical output is returned. An invisible grid::grid_null() grob is returned instead.

Usage

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

Arguments

mapping

Set of aesthetic mappings created by aes. If specified and inherit.aes = TRUE (the default), are combined with the default mapping at the top level of the plot. You only need to supply mapping if there isn't a mapping defined for the plot.

data

A data frame. If specified, overrides the default data frame defined at the top level of the plot.

stat

The statistical transformation to use on the data for this layer, as a string.

position

Position adjustment, either as a string, or the result of a call to a position adjustment function.

na.rm

If FALSE (the default), removes missing values with a warning. If TRUE silently removes missing values.

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.

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. There are three types of arguments you can use here:

  • Aesthetics: to set an aesthetic to a fixed value, like color = "red" or size = 3.

  • Other arguments to the layer, for example you override the default stat associated with the layer.

  • Other arguments passed on to the stat.

Value

A plot layer instance. Mainly used for the side-effect of printing to the console the data object.

Note

This geom is very unusual in that it does not produce visible graphic output. It only returns a grid.null grob (graphical object). However, it accepts for consistency all the same parameters as normal geoms, which have no effect on the graphical output, except for show.legend.

Examples

ggplot(mtcars) +
  geom_null()


ggplot(mtcars, aes(cyl, mpg)) +
  geom_null()


# shape data

if (requireNamespace("sf", quietly = TRUE)) {
  nc <- sf::st_read(system.file("shape/nc.shp", package = "sf"), quiet = TRUE)

  ggplot(data = nc) +
    geom_null()
}