Coerce to labeller function

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.

Description

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

Examples

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))

See also

labeller(), labellers