R help - Oct 2022 - statistical error in ggerrorplot argument desc_statby

Hello!
I think there is a major statistical error or at least an inaccuracy  
in ggerrorplot and I don't know where to report this problem.

When using ggerrorplot, you can choose the argument desc_statby=sd or  
desc_statby= se. Where sd is described as "standard deviation of the  
mean".
and se as "standard error of the mean".
This makes no sense at all, because the standard error of the mean is  
exactly the standard deviation of the mean.

Whereas sd is usually used to denote the standard deviation of the sample.

The standard error of the mean or the standard deviation of the mean  
(sem) equals the standard deviation of the sample divided by the root  
of the sample size: sem= sd/root(n).


In error charts, it is common to represent the mean in combination  
with the sample standard deviation (sd) or the standard error of the  
mean (sem).

I think it is important to clarify the difference between sem and sd  
in relation to desc_statby as they because they are often confused by  
students and researchers alike.

Kind regards

Claudia

I suppose the key concept you seem to be missing is that contributed packages
are not part of R, nor are the R developers going to do anything to fix it, even
if they might happen to lurk around here occasionally, and many package
maintainers do not lurk at all on this list.

If you type ?ggerrorplot at the R prompt you should learn that it is part of the
ggpubr package. If you type maintainer("ggpubr") you should learn who
_is_ responsible for that package. And if you Google for "cran ggpubr"
you should find the canonical web https://CRAN.R-project.org/package=ggpubr on
which there is an entry for Bug Reports leading in this case to a GitHub issues
tracker. So, an email directed at the maintainer or a quick Google search would
be far more likely to lead to an effective change than posting here will.

Do (re-)read the Posting Guide... there are all sorts of tidbits in there.

On October 17, 2022 1:29:40 AM PDT, paladini at trustindata.de
wrote:
>Hello!
>I think there is a major statistical error or at least an inaccuracy in
ggerrorplot and I don't know where to report this problem.
>
>When using ggerrorplot, you can choose the argument desc_statby=sd or
desc_statby= se. Where sd is described as "standard deviation of the
mean".
>and se as "standard error of the mean".
>This makes no sense at all, because the standard error of the mean is
exactly the standard deviation of the mean.
>
>Whereas sd is usually used to denote the standard deviation of the sample.
>
>The standard error of the mean or the standard deviation of the mean (sem)
equals the standard deviation of the sample divided by the root of the sample
size: sem= sd/root(n).
>
>
>In error charts, it is common to represent the mean in combination with the
sample standard deviation (sd) or the standard error of the mean (sem).
>
>I think it is important to clarify the difference between sem and sd in
relation to desc_statby as they because they are often confused by students and
researchers alike.
>
>Kind regards
>
>Claudia
>
>______________________________________________
>R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.
-- 
Sent from my phone. Please excuse my brevity.