[BioC] random block effect and technical replicates within array at the same in linear model using Limma?

[Gordon K Smyth]

> Date: Thu, 2 Jun 2005 11:47:15 +0200
> From: Peter S?rensen (HAG) <Peter.Sorensen2 at agrsci.dk>
> Subject: [BioC] random block effect and technical replicates within
> 	array at	the same in linear model using Limma ?
> To: <bioconductor at stat.math.ethz.ch>
>
> Dear list,
>
> I have an experiment with 24 arrays.
> I have 3 factors each with 2 levels and 12 blocks (1,1,2,2,3,3,....,12,12).
> Each gene is replicated 4 times on each array.
>
> I know how to fit blocks as random as explained in the Limma manual (Technical replication I)
> I know how to account for the replication within arrays.
>
>
> Is it possible to fit random block effect and technical replicates within array at the same in
> linear model using Limma ?

No it isn't.  (Being able to do so awaits the development of new theory.)  See
?duplicateCorrelation 2nd paragraph of "Details:", or ?lmFit 4th paragraph of "Details:".

Gordon

> Thanks
> Peter