[Maturing]

gghiglight() highlights (almost) any geoms according to the given predicates.

gghighlight(
  ...,
  n = NULL,
  max_highlight = 5L,
  unhighlighted_params = list(),
  use_group_by = NULL,
  use_direct_label = NULL,
  label_key = NULL,
  label_params = list(fill = "white"),
  keep_scales = FALSE,
  calculate_per_facet = FALSE,
  unhighlighted_colour = NULL
)

Arguments

...

Expressions to filter data, which is passed to dplyr::filter().

n

Number of layers to clone.

max_highlight

Max number of series to highlight.

unhighlighted_params

Aesthetics (e.g. colour, fill, and size) for unhighlighted geoms. Specifying colour = NULL or fill = NULL will preserve the original colour.

use_group_by

If TRUE, use dplyr::group_by() to evaluate predicate.

use_direct_label

If TRUE, add labels directly on the plot instead of using a legend.

label_key

Column name for label aesthetics.

label_params

A list of parameters, which is passed to ggrepel::geom_label_repel().

keep_scales

If TRUE, keep the original data with ggplot2::geom_blank() so that the highlighted plot has the same scale with the data.

calculate_per_facet

(Experimental) If TRUE, include the facet variables to calculate the grouping; in other words, highlighting is done on each facet individually.

unhighlighted_colour

(Deprecated) Colour for unhighlighted geoms.

Examples

d <- data.frame( idx = c(1, 1, 1, 2, 2, 2, 3, 3, 3), value = c(1, 2, 3, 10, 11, 12, 9, 10, 11), category = rep(c("a", "b", "c"), 3), stringsAsFactors = FALSE ) # Highlight the lines whose max values are larger than 10 ggplot(d, aes(idx, value, colour = category)) + geom_line() + gghighlight(max(value) > 10)
#> label_key: category
# Highlight the points whose values are larger than 10 ggplot(d, aes(idx, value)) + geom_point() + gghighlight(value > 10, label_key = category)
# Specify the styles for unhighlighted layer ggplot(d, aes(idx, value, colour = category)) + geom_line(size = 5) + gghighlight(max(value) > 10, unhighlighted_params = list(size = 1) )
#> label_key: category