Line-type scale — scale_linetype • vellumplot

Declare the scale for a mapped (discrete) linetype aesthetic. Levels cycle through a default set of line types unless values is given. A line-type legend is drawn automatically. Applies to line-like marks (mark_line(), mark_step()).

Usage

scale_linetype(plot, values = NULL, name = NULL)

scale_linetype_discrete(plot, values = NULL, name = NULL)

Arguments

plot: A PlotSpec.
values: Character vector of line types (each one of "solid", "dashed", "dotted", "dotdash", "longdash", "twodash"), or NULL for the default set.
name: Legend title, or NULL to derive from the encoding.

Value

The modified PlotSpec.

Examples

df <- data.frame(x = rep(1:10, 2), y = rnorm(20), g = rep(c("a", "b"), each = 10))
vplot(df) |> mark_line(x = x, y = y, linetype = g)