Question

I’m working on a plot where I need to draw legends and I require one of them to be a triangle.

  plot.new()
  legend(x=.5,y=.9, c("A","B","C","D"), cex=.8, bty="n", 
         fill = c("green","yellow","red","blue"))

I would like legend D to be triangle in shape. How can I implement this?

Regards

Answer 1

Use pch and col (instead of fill):

plot.new()
legend(x=.5,y=.9, c("A","B","C","D"), cex=.8, bty="n",
       col=c("green", "yellow", "red", "blue"), pch=c(15, 15, 15, 17))