The debug geom is used to print to the console a summary of the data being received by geoms as input data data frame.

geom_debug(mapping = NULL, data = NULL, stat = "identity", = tibble::as_tibble, = list(), = print, = list(), position = "identity",
  na.rm = FALSE, show.legend = FALSE, inherit.aes = TRUE, ...)



Set of aesthetic mappings created by aes or aes_. If specified and inherit.aes = TRUE (the default), is 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.


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


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

A function used to print the data object received as input.

A list of additional arguments to be passed to

A function used to print the value returned by

A list of additional arguments to be passed to


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


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


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.


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.


It can be useful when debugging the code of statistics or to learn how the stats and geoms work in 'ggplot2' (>= 2.0.0).


This _geom_ is very unusual in that it does not produce visible graphic output. It only returns a grid::grid_null() grob (graphical object).