On Tue, 28 Oct 2003, Russell Senior wrote:
> >>>>> "Uwe" == Uwe Ligges <[EMAIL PROTECTED]> writes:
>
>
> Uwe> See ?formula and its "See Also" Section on how to do formula
> Uwe> manipulation. There's also an example on how to construct a
> Uwe> formula.
>
> Russell> In order to use the 'as.formula(paste(response," ~
> Russell> ",factor))' approach, response and factor seem to need to be
> Russell> strings (at least they seem to if response is "log(x)" or the
> Russell> like). Whereas, for pairwise.t.test they need to be names.
> Russell> What is the proper way to do that?
>
I'd actually advise a different strategy. Consider:
data(airquality)
formula<- log(Ozone)~factor(Month)
m<-lm(formula,data=data)
a<-anova(m)
mf<-model.frame(lm)
pairwise.t.test(mf[,1], mf[,2])
-thomas
______________________________________________
[EMAIL PROTECTED] mailing list
https://www.stat.math.ethz.ch/mailman/listinfo/r-help
