Labeller to break a facet label into two lines

Returns a ggplot2 labeller that inserts a single line break into facet strip labels, splitting at the last word boundary at or before width characters. This is the facet equivalent of pm_gg_break(), which breaks axis and other aesthetic labels on a plot.

pm_label_break(width)

Arguments

width

character width at which to insert the line break; the label is split at the last word boundary at or before this position.

Value

A labeller function suitable for the labeller argument of ggplot2::facet_wrap() or ggplot2::facet_grid().

See also

pm_gg_break(), pm_gg_break_aes() to break axis and aesthetic labels on a plot.

Examples

library(ggplot2)

data <- data.frame(
  x = rnorm(60),
  y = rnorm(60),
  grp = rep(c("Short label", "A much longer label for this group"), 30)
)

ggplot(data, aes(x, y)) +
  geom_point() +
  facet_wrap(~grp, labeller = pm_label_break(15))