Add labeller example for optional argument. Fixes #5916

sierrajohnson · sierrajohnson · commit 66b31c88b29e · 2024-08-15T11:47:30.000-07:00
diff --git a/DESCRIPTION b/DESCRIPTION
@@ -78,7 +78,7 @@ Config/testthat/edition: 3
 Encoding: UTF-8
 LazyData: true
 Roxygen: list(markdown = TRUE)
-RoxygenNote: 7.3.1
+RoxygenNote: 7.3.2
 Collate: 
     'ggproto.R'
     'ggplot-global.R'
diff --git a/R/labeller.R b/R/labeller.R
@@ -83,6 +83,9 @@
 #' # Interpreting the labels as plotmath expressions
 #' p + facet_grid(. ~ cyl2)
 #' p + facet_grid(. ~ cyl2, labeller = label_parsed)
+#'
+#' # Include optional argument in label function
+#' p + facet_grid(. ~ cyl, labeller = function(x) label_both(x, sep = "="))
 #' }
 #' @name labellers
 NULL
diff --git a/man/labellers.Rd b/man/labellers.Rd
