[R] ggplot2 error bars and convex hulls

Rui Barradas ru|pb@rr@d@@ @end|ng |rom @@po@pt
Tue Apr 21 19:06:19 CEST 2020


As for convex hulls, there is an example of how to construct a stat_hull in

vignette("extending-ggplot2", package = "ggplot2")

There is also a geom_hull in a GitHub package:


Hope this helps,

Rui Barradas

Às 17:02 de 21/04/20, Ivan Calandra escreveu:
> Dear useRs,
> I would like to have horizontal and vertical error bars extending from
> the means on two continuous variables.
> This would be the "manual" way of doing it, computing the mean and sd
> (or whatever stats) beforehand and then calling geom_errorbar() and
> geom_errorbarh() with appropriate coordinates:
> https://stackoverflow.com/questions/12570816/ggplot-scatter-plot-of-two-groups-with-superimposed-means-with-x-and-y-error-bar
> But I am a bit surprised that there is no "built-in" way of doing it
> with ggplot2. I mean not having to compute mean and sd beforehand and
> not having to call both geom_errorbar() and geom_errorbarh() with a new
> set of aesthetics.
> In the same idea, I am looking at convex hulls and I was also expecting
> to have a built-in way to do this in ggplot2. But I have only found this
> "manual" way:
> https://stats.stackexchange.com/questions/22805/how-to-draw-neat-polygons-around-scatterplot-regions-in-ggplot2
> Thank you in advance for any pointer.
> Ivan

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