[R-sig-Geo] ANOVA with correlated errors

[Edzer J. Pebesma]

Jose, I think package nlme can deal with such models as well, and
it may be slightly more oriented towards the analysis of experiments
than geoR is, please correct me if I'm wrong.

Best regards,
--
Edzer

Jose A. Hernandez wrote:

> Dear R colleagues,
>
> My name is Jose Hernandez and work in the analysis of on-farm 
> experiments.
>
> I've been a R user for sometime now, however am still struggling 
> figuring out some of my spatial analysis using R.
>
> Most of my experiments have the following model:
>
> Y_ij = Mu + r_i + T_j + e_ij
>
> Where:
> r_i is some replication and T_j some fixed treatment effect.
>
> I many cases there is significant within block heterogeneity and 
> therefore I can't assume that e_ij are iid.
>
> An alternative is to use:
>
> Y_ij = Mu + T_j + e_ij
>
> And assume that:
>
> e_ij follows some spatial covariance model such as exponential, 
> spherical, etc.
>
>
> Are there any R packages that will integrate spatial variability into 
> the model ?
>
> Thanks and advance and best regards !
>
> Jose
>
>