ggplot2 helpers — scale_fill_selection • crosstalk

Add scale_fill_selection() or scale_color_selection to a ggplot to customize the scale for fill or color, respectively, for linked brushing. Use selection_factor to turn logical vectors representing selection, to a factor with the levels ordered for use with ggplot2 bar stacking.

scale_fill_selection(color_false, color_true)

scale_color_selection(color_false, color_true)

selection_factor(
  x,
  na.replace = c(FALSE, NA, TRUE),
  reverse = packageVersion("ggplot2") < "2.2.0"
)

Arguments

color_false: The color that should be mapped to unselected rows
color_true: The color that should be mapped to selected rows
x: Either a data frame with a selected_ column, or, a logical vector indicating which rows are selected
na.replace: The value to use to replace NA values; choose either FALSE, NA, or TRUE based on how you want values to be treated when no selection is active
reverse: Whether the factor level order should be c(FALSE, TRUE) (normal) or c(TRUE, FALSE) (reverse). The former is required for ggplot2 2.2.0+, the latter for earlier versions.

Examples

if (FALSE) { # \dontrun{
sd <- SharedData$new(iris)
renderPlot({
  df <- sd$data(withSelection = TRUE, withFilter = TRUE)
  ggplot(df, aes(Sepal.Length, Sepal.Width,
    color = selection_factor(df))) +
    geom_point() +
    scale_color_selection("#444444", "skyblue1")
})

} # }