[R] Errors on bar plots

[Gabor Grothendieck]

On 6/3/05, Fikret Isik <fisik at ncsu.edu> wrote:
> Hi R Gurus,
> 
> I am a new R user. I did my home work by reading the manuals and
> searching the internet for examples but failed to find an example before
> writing this message for help.
> 
> I would like to create bar plots with the standard error of the mean (or
> 95% confidence intervals) on the bar.
> 
> Any suggestions will be appreciated.
> 
> Operating system: Windows XP pro
> R version 2.1.0
> 
> Data look like this:
> 
> Site Family  Height
> 1     A         12.3
> 1     B         13.5
> 1     C         17.4
> 2     A         14.0
> 2     B         11.1
> 2     C         15.9
> .       .          .
> 

Is this what you are looking for?

http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=54

If so look at barplot2 in package gplots which is in the gregmisc bundle.

You could also look at the notch argument to boxplot.