如何使用 R 中的带状图在水平方向上使用点函数？

Question

I am trying to get a stripchart with their medians in the horizontal. In the stripchart function there is a parameter that allows you to do that ( vertical=F ) but I cannot find a similar parameter to draw the medians in the horizontal using points .

My example:

median <- tapply(mtcars$mpg, mtcars$gear, median)

stripchart(mpg ~ gear,
           data = mtcars, 
           main = "title",
           xlab = "x axis",
           ylab = "y axis",
           col = c('green', 'blue', 'purple'),
           pch = 16,
           cex = 0.8,
           method = 'jitter',
           vertical = F)
points(x=c(median), pch="--", cex=5)

This is what I am getting right now:

This is what I would like to have (but instead of in the vertical way, I want in the horizontal way). [Same code than before but using vertical = F ].

Does anyone know how can I do it?

Thanks very much in advance

Regards

Answer 1

Thanks to this post , I found the solution!

stripchart(mpg ~ gear,
           data = mtcars, 
           main = "title",
           xlab = "x axis",
           ylab = "y axis",
           col = c('green', 'blue', 'purple'),
           pch = 16,
           cex = 0.8,
           method = 'jitter',
           vertical = F)
points(c(median), order(median), pch="|", cex=2)