Thank you for your answer!
I have two additional questions, in line with the previous one:
1. how can I obtain tick marks flanking the labels, instead of being
aligned with them (similar to the pipe symbols on my example)?
2. how can I obtain tick marks of different sizes, so that the marks
separating the groups are longer?
Thank you for your help!
Sebastien
On Mon, Aug 22, 2011 at 2:07 PM, Joshua Wiley <jwiley.ps...@gmail.com>wrote:
> Hi Sébastien,
>
> Not sure about an elegant, general way but here is something quick and
> dirty:
>
> p <- barplot(matrix(1:8, 2))
> axis(1, at = p, labels = letters[1:4])
> axis(1, at = c(mean(p[1:2]), mean(p[3:4])), labels = paste("\n",
> LETTERS[1:2]), padj = 1)
>
> Cheers,
>
> Josh
>
>
>
> On Mon, Aug 22, 2011 at 10:14 AM, Sébastien Vigneau
> <sebastien.vign...@gmail.com> wrote:
> > Hi,
> >
> > I would like to draw a stacked bar chart with four bars (say "a", "b",
> "c",
> > "d") . Two bars belong to group A and the two others to group B.
> Therefore,
> > I would like to have, on the x-axis, a label for each bar and an
> additional
> > label for each group, positioned underneath. To give an idea, the x-axis
> > labels should look like this:
> > |a|b|c|d|
> > | A | B |
> >
> > Do you know how I can generate such two-levels labels in R?
> >
> > Thank you for your help!
> >
> > Sebastien
> >
> > [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > 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.
> >
>
>
>
> --
> Joshua Wiley
> Ph.D. Student, Health Psychology
> Programmer Analyst II, ATS Statistical Consulting Group
> University of California, Los Angeles
> https://joshuawiley.com/
>
[[alternative HTML version deleted]]
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