Like any legend key glyphs, this key can be used to display arrows in a legend.
Arguments
- data
A single row data frame containing the scaled aesthetics to display in this key
- params
A list of additional parameters supplied to the geom.
- size
Width and height of key in mm.
Examples
ggplot(mpg, aes(displ, colour = factor(cyl))) +
geom_density(key_glyph = draw_key_arrow)
