On Tue, Sep 22, 2009 at 12:03 PM, Erich Neuwirth
<erich.neuwi...@univie.ac.at> wrote:
> I need to play games with an expression similar to the following one:
>
> print(xyplot(DepVar ~ Group|Covar, groups=Othergroup,
> data=mydf, pch = 18 ,main="Testcase",auto.key = TRUE))
>
>
> The problem is that the formula argument (the first argument)
> an the groups argument are passed over from another program as strings.
>
> The formula argument does not pose problems,
> I can do as.formula("DepVar ~ Group|Covar")
> bit I could not find an equivalent technique for the groups parameter.
'groups' can be a formula too, e.g.,
xyplot(Sepal.Length ~ Petal.Length, iris, groups = ~Species)
-Deepayan
______________________________________________
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.
