R plot legend with transparent background

Question

How to R plot legend with transparent background when using plot() function ?

Quadrature

you can use bty="n" inside legend – Rowlock

Note also that legend accepts the bg argument, so that you can fill in the background with a different color if desired. – Haunt

Answer 1

Use: bg="transparent" in

legend()

Such as:

legend("right",bg="transparent",col=c(as.numeric(unique(df$group2))),cex=0.5)

Belligerent