[R] lme ->Error in getGroups.data.frame(dataMix, groups)

[Bert Gunter]

In brief, your random effects formula syntax is wrong. You need to (re)
study ?lme or suitable tutorials for details of how to do what you want --
if you can with lme (e.g. crossed random effects are very difficult in lme,
much easier in lmer).

However, you should probably re-post on the r-sig-mixed-models list to
receive better and *more expert* help.

Cheers,
Bert


On Sat, Nov 24, 2018 at 2:31 PM Boy Possen <bpossen using gmail.com> wrote:

> The basic idea is to create a linear model in R such that FinH is explained
> by SoilNkh, dDDSP, dDDSP2, Provenance, Site, Genotype and Block, where
> SoilNkh, dDDSP and dDDSP2 are continuous covariates, Provenance, Site,
> Genotype and Block are factors, Site and Provenance are fixed and Genotype
> and Block are random. Also, Genotype is nested within Provenance and Block
> within Site.
>
> Since the order the variables go in is of importance, it should be a Anova
> type-I with the parameters in following order:
>
> FinH~SoilNkh,Site,dDDSP,dDDSP2,Provenance,Site:Provenance,Provenance/Genotype,Site/Block
>
>
> For the fixed part I am oké with either:
>
> test31 <-lm(FinH~SoilNkh + Site + dDDSP + dDDSP2 + Provenance +
> Site:Provenance ,data=d1)
>
> test32 <-aov(FinH~SoilNkh + Site + dDDSP + dDDSP2 + Provenance +
> Site:Provenance ,data=d1
>
> When trying to specify the random-part, taking the above text as starting
> point, trouble starts :)
>
> I feel it should be of the form:
>
> test64 <- lme(FinH~SoilNkh + Site + dDDSP + dDDSP2 + Provenance +
> Site:Provenance,
>             random = ~1|Provenance/Genotype + ~1|Site/Block,data=d1)
>
> but I can't avoid the error
>
> "Error in getGroups.data.frame(dataMix, groups) : invalid formula for
> groups"
>
> I am lost for clues, really, so any advice would be great! If any data
> should be supplied, I'd be happy to provide of course, but can't (yet)
> figure out how...
>
> Thanks in advance for your time.
>
>
> --
> B.J.H.M. Possen
>
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>
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