Get used vars in a ggplot object

Usage

get_vars(p, reverse = FALSE, verbose = TRUE)

Arguments

p: A ggplot object.
reverse: Whether to return unused vars. Default is FALSE.
verbose: Whether to print the message. Default is TRUE.

Value

A character vector of variable names. If reverse is FALSE, returns used variables; if TRUE, returns unused variables.

Examples

library(ggplot2)
p <- ggplot(
  data = mtcars,
  aes(x = mpg, y = wt, colour = cyl)
) +
  geom_point()
get_vars(p)
#> ℹ [2025-12-10 13:54:21] Vars_used: "mpg", "cyl", and "wt"
#> ℹ                       vars_notused: "disp", "hp", "drat", "qsec", "vs", "am", "gear", and "carb"
#> [1] "mpg" "cyl" "wt" 
get_vars(p, reverse = TRUE)
#> ℹ [2025-12-10 13:54:21] Vars_used: "mpg", "cyl", and "wt"
#> ℹ                       vars_notused: "disp", "hp", "drat", "qsec", "vs", "am", "gear", and "carb"
#> [1] "disp" "hp"   "drat" "qsec" "vs"   "am"   "gear" "carb"