Have a look at the 'scales' argument. For example:
# default plot
xyplot(Sepal.Length ~ Petal.Length | Species, data = iris)
# modified plot
xyplot(Sepal.Length ~ Petal.Length | Species, data = iris,
scales=list(y=list(at=c(-5,0,5,10), limits=c(-5,10))))
-Peter Ehlers
Jay wrote:> Hi,
>
> I'm terribly sorry but it seems it cannot figure this one out by
> myself so, please, if somebody could help I would be very grateful.
> So, when I plot with xyplot() I get an y-axis that is very ugly...
> starting from a random number and having so many ticks that it becomes
> unreadable.
>
> How do I tell xyplot how to draw the axis? E.g., start from 100, end
> at 200 with 25 units between ticks/labels?
> Can somebody give me an example?
>
> Thanks!
>
> ______________________________________________
> R-help at 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.
>
>
--
Peter Ehlers
University of Calgary
403.202.3921