make pch symbols bigger in legend in R

Question

Is there a way ONLY to make the pch symbols bigger using this piece of code? I cant seem to figure this out.

plot(1)
legend("topright", legend=c(1,2,3,4,5,6),
       pch=c(20), col=c("red", "yellow", "green", "violet", "skyblue", "cyan"),
       title="number of studies", pt.cex=1.2)

Answer 1

您可以在图例中设置pt.cex来放大点。