Question

I was wondering how I could go about creating an opaque legend box in R for my plots? I’ve tried using bg=”grey”, but the lines on the graph are still covering the legend.

Answer 1

You have to use bg=”white” (or any other color, as you already did) and you have to draw the legend after you plot the lines/points/grid/etc.

For example:

plot(...)
lines(...)
grid(...)
legend(...) # legend has to be the last command!