Draw polygons to highlight subsets

A handy wrapper for the ggplot2::geom_polygon() used to represent the result of set operations.

Usage

highlight(
  venn,
  setops,
  color = "black",
  linewidth = 1.2,
  linetype = "solid",
  fill = "black",
  alpha = 0.2,
  ...
)

Arguments

venn: Venn diagram produced from venny::venny().
setops: The result of set operations.
color: Character (default: "transparent"). The polygon line color.
linewidth: Numeric (default: 1.5). The polygon linewidth.
linetype: Character (default: "solid"). The polygon linetype.
fill: Character (default: "black"). The polygon color.
alpha: Numeric (default: 0.4). The polygon transparency (0-1).
...: The other arguments passed into ggplot2::geom_polygon.

Value

A ggplot object.

Examples

data <- list(
    Set_A = c(10:100, 500:600),
    Set_B = c(5:150, 550:650),
    Set_C = c(80:180, 580:680),
    Set_D = c(120:220, 520:620)
)
out <- venny(data, detail = TRUE)
p0 <- out$venn
ep <- out$ellipse_path
res <- intersect(ep$Set_A, ep$Set_B, ep$Set_D)
highlight(p0, res)