Lollipop chart layer — mark_lollipop • plotit

Creates a lollipop chart: a point anchored by a stem to a reference line. This is a syntax-sugar composite mark combining geom_segment and geom_point.

Usage

mark_lollipop(
  plot,
  mapping = NULL,
  data = NULL,
  stem_colour = "grey50",
  stem_width = 0.5,
  point_size = 3,
  ...
)

Arguments

plot: A plotit object
mapping: Optional new aesthetics
data: Optional data for this layer
stem_colour: Colour for the stem lines (default "grey50").
stem_width: Line width for stems (default 0.5).
point_size: Point size for the lollipop head (default 3).
...: Other arguments passed to mark_point()

Value

Modified plotit object

Details

Equivalent expansion:


  p |> mark_rule(x = x, xend = x, y = ref, yend = y) |>
       mark_point(x = x, y = y)

Examples

df <- data.frame(cat = LETTERS[1:5], val = c(3, 7, 2, 9, 5))
plotit(df, encode(x = cat, y = val)) |>
  mark_lollipop(point_size = 4, stem_colour = "grey70")