Does a layer use a specific stat parameter?

uses_stat_param is a mirror function of uses_geom_param but instead of checking a plot's geom layer, it checks that a plot's stat layer uses a specific stat parameter.

Usage

uses_stat_param(p, stat, params, i = NULL)

Arguments

p

A ggplot object

stat

A character string found in the suffix of a ggplot2 stat function, e.g. "bin".

params

A named list of stat or geom parameter values, e.g. list(bins = 200)

i

A numerical index, e.g. 1.

Value

A boolean

Details

To specify a specific stat layer, either specify using position using the i index or by using a combination of stat function suffix name and i to check the ith layer that uses the stat.

Examples

require(ggplot2)
p <- ggplot(diamonds, aes(carat)) +
  stat_bin(bins = 200)
uses_stat_param(p, stat = "bin", params = list(bins = 200))
#> [1] TRUE