Hi Bert, Dennis,

I'll agree that using a barchart was a poor choice. I was in fact using a
notched bwplot to show the median and confidence interval of the median. In
this case it's the median and confidence interval that I want to highlight,
and I find that the visual noise of the box and whiskers is detracting from
the focus, and those wee notches are not much to focus on. So, I'd like to
draw a stripplot with error bars, preferably in Lattice. Let's call this a
TIE fighter plot. Any suggestions?

Cheers,
Shaun

On 4 July 2013 18:00, Dennis Murphy <djmuser@gmail.com> wrote:

> If you consult the lattice package help, you'll discover there is no
> panel_errorbar() function, which would imply the package developers
> have a distaste for that type of graphic. If you fish around the
> R-help archives, though, you might be able to find someone who wrote a
> function to do error bars in lattice. (Use a searchable archive such
> as Nabble to hunt for it.)
>
> Error bar plots are easier to do in the ggplot2 package, since there
> is a specific function to generate the error bar 'geometry'
> (geom_errorbar). See http://docs.ggplot2.org/current/ for an expanded
> version of the package help pages, which include the graphs generated
> by the code. I believe there's also a base graphics version that you
> can get from the gplots package, but I don't know a lot about it.
>
> Dennis
>
> On Thu, Jul 4, 2013 at 2:53 PM, Shaun Jackman <sjackman@gmail.com> wrote:
> > Hi,
> >
> > I'd like to draw a lattice barchart of means with error bars to show
> > the standard deviation. I have the barchart, how do I add the error
> > bars?
> >
> > require(datasets)
> > require(lattice)
> > x <- aggregate(weight ~ Diet, ChickWeight, function(x) c(mean=mean(x),
> > sd=sd(x)))
> > barchart(weight[,'mean'] ~ Diet, x)
> >
> > Thanks,
> > Shaun
> >
> > ______________________________________________
> > R-help@r-project.org mailing list
> > 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.
>

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