使用ggplot2更改图例文本的颜色与上述geom_point（）的颜色相同

Question

I have legend having three values namely - high low med.

I want the colour of text high to same as shape object ie blue and low as red and med as green Colour are mentioned in geom_point().

Is it possible to change the colour of legend text?

Answer 1

If p is your plot, you can save it as a grob and edit the labels one-by-one with grid commands,

g = ggplotGrob(p)
grid.draw(g)
grid.edit("label-3", grep=TRUE, global=TRUE,
           gp=gpar(col="red", cex=1))