[R-sig-ME] Contrast in lme4

[Douglas Bates]

It is better to send questions like this to the
R-SIG-Mixed-Models at R-project.org mailing list, which I am cc:ing on this
reply.

On Thu, Mar 12, 2015 at 3:09 AM adeela uaf <adeela.uaf at gmail.com> wrote:

> Dear Douglas Bates,
> How to perform contrast analysis for fixed effects in lme4 package. My
> data is same as sleepstudy data with an additional cloumn comprising  12
> treatments also. The structure of the treatmnets is such that:
> 1) 1 treatment is control
> 2) 4 treatments are bio-agents.
> 3) 3 treatments are botanical.
> 4) 2 are bi prodcts
> 5) 2 are fungisides
> I want to make comparison among the groups which differ significantly
> after
> Model<-lmer(Disease~Trt+Date+Trt*Date+(1|Subject),data=YR)
> Best Regars,
> Adeela
>

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