# as_labeller

0th

Percentile

##### Coerce to labeller function

This transforms objects to labeller functions. Used internally by labeller().

Keywords
internal
##### Usage
as_labeller(x, default = label_value, multi_line = TRUE)
##### Arguments
x
Object to coerce to a labeller function. If a named character vector, it is used as a lookup table before being passed on to default. If a non-labeller function, it is assumed it takes and returns character vectors and is applied to the labels. If a labeller, it is simply applied to the labels.
default
Default labeller to process the labels produced by lookup tables or modified by non-labeller functions.
multi_line
Whether to display the labels of multiple factors on separate lines. This is passed to the labeller function.
labeller(), labellers
library(ggplot2) p <- ggplot(mtcars, aes(disp, drat)) + geom_point() p + facet_wrap(~am) # Rename labels on the fly with a lookup character vector to_string <- as_labeller(c(0 = "Zero", 1 = "One")) p + facet_wrap(~am, labeller = to_string) # Quickly transform a function operating on character vectors to a # labeller function: appender <- function(string, suffix = "-foo") paste0(string, suffix) p + facet_wrap(~am, labeller = as_labeller(appender)) # If you have more than one facetting variable, be sure to dispatch # your labeller to the right variable with labeller() p + facet_grid(cyl ~ am, labeller = labeller(am = to_string))