Accessing a plot's facet strip labels

This functions retrieves labels from facet strips with the labeller applied.

Usage

get_strip_labels(plot = get_last_plot())

Arguments

plot

A ggplot or build ggplot object.

Value

NULL if there are no labels, otherwise a list of data.frames containing the labels.

Examples

# Basic plot
p <- ggplot(mpg, aes(displ, hwy)) +
  geom_point()

get_strip_labels(p) # empty facets
#> NULL
get_strip_labels(p + facet_wrap(year ~ cyl))
#> $facets
#>   year cyl
#> 1 1999   4
#> 2 1999   6
#> 3 1999   8
#> 4 2008   4
#> 5 2008   5
#> 6 2008   6
#> 7 2008   8
#> 
get_strip_labels(p + facet_grid(year ~ cyl))
#> $cols
#>   cyl
#> 1   4
#> 2   5
#> 3   6
#> 4   8
#> 
#> $rows
#>   year
#> 1 1999
#> 2 2008
#>