[R] ggplot2 error bars and convex hulls

Ivan Calandra c@|@ndr@ @end|ng |rom rgzm@de
Wed Apr 22 08:38:44 CEST 2020


Thanks Rui for these 2 possibilities; I'll have a look.

Any one with pointers for the error bars issue?

Ivan

--
Dr. Ivan Calandra
TraCEr, laboratory for Traceology and Controlled Experiments
MONREPOS Archaeological Research Centre and
Museum for Human Behavioural Evolution
Schloss Monrepos
56567 Neuwied, Germany
+49 (0) 2631 9772-243
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On 21/04/2020 19:06, Rui Barradas wrote:
> Hello,
>
> 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:
>
> devtools::install_github("cmartin/ggConvexHull")
>
>
> 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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