使R中的图例符号变大

Question

有没有办法仅使用这段代码使pch符号变大？ 我似乎无法弄清楚。

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。