Order groups in a stacked stripchart by sum in R

问题

I have a grouped and stacked stripchart() in R.

stripchart(gear ~ cyl, data=mtcars, method="stack")

cyl are the groups here. I want to groups ordered by its sum. From bottom to top the ordering should be 6, 4 and 8.

How can I do this automaticly in a stripchart?

回答1:

As mentiont from Jota and with detailed help from How to order factors by condition in R?

Transforming cyl into factor and order it's levels.

mtcars$cyl <- factor(mtcars$cyl, levels=names(sort(table(mtcars$cyl))))

来源：https://stackoverflow.com/questions/42426970/order-groups-in-a-stacked-stripchart-by-sum-in-r