You may want to try something like this:

x1<-rnorm(500)
plot(x1)
test<-seq(1987, 2002, by=1)
test_2<-seq(2003, 2006, by=1)
test<-format(c(test, test_2), width=5)
xxx<-seq(1,500,length=length(test))
axis(1,at=xxx,labels=test,line=1,col=0)

You'll need to specify where you want the labels (in this code I do that
with xxx).

-tgs

On Tue, Oct 19, 2010 at 12:55 PM, Simon Kiss <sjkiss@gmail.com> wrote:

> Dear colleagues, this seems like an easy problem, and I found some
> suggestions which I've incorporated in the help list, but I can't quite get
> it right.
> I want to add a series of years to a second x-axis category label. I
> generate them with test and test_2 below, format them with some spacing
> (which is the suggestion I took from the R-list) and concatenate them and
> then write them with mtext.  At the end, the labels in test are bunched up
> together in the center of the plot window.  Can anyone suggest a way to
> space out the elements of "test" to look like evenly-spaced x-labels?
> Yours,
> Simon Kiss
>
> x1<-rnorm(500)
> plot(x1)
>
> test<-seq(1987, 2002, by=1)
>
> test_2<-seq(2003, 2006, by=1)
>
> test<-format(c(test, test_2), width=5)
>
> mtext(test, side=1, line=2)
> *********************************
> Simon J. Kiss, PhD
> Assistant Professor, Wilfrid Laurier University
> 73 George Street
> Brantford, Ontario, Canada
> N3T 2C9
> Cell: +1 519 761 7606
>
> ______________________________________________
> 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.
>

	[[alternative HTML version deleted]]

