将点添加到多个箱图

Question

如何在不同长度的彼此旁边的几个箱图中添加点？

boxplot(box1, box2, box3, box4, beside=T, col=c("grey100", "grey70", "grey50", "grey70"), names=c("box1", "box2", "box3", "box4"), main="all the boxes", las=2)

如果我用

输入内容

points() 

功能我不能添加多个，如果我将它们单独放入，它们将被添加到所有的箱图中，我只想看到相应的点。

Answer 1

尝试：

ndata=mtcars[mtcars$carb%in%c(1:4),]
boxplot(mpg ~ carb, data=ndata 
        , beside=T,
        col=c("grey100", "grey70", "grey50", "grey70"),
        names=c("box1", "box2", "box3", "box4"),
        main="all the boxes", las=2)

points(factor(ndata$carb), ndata$mpg,col=3)
points(3,30,col=4,pch=13)
text (3.5,30,"Oops",pos = 4)