[BioC] need help regarding microarray data analysis using limma

[J.delasHeras at ed.ac.uk]

Quoting varshika singh <varshika13singh at gmail.com> on Thu, 13 Dec 2012  
11:02:15 +0530:

> Dear Sir/Madam
> I am using bioconductor package for analysis of Agilent two color data.
> After normalisation when i am giving command  dat.m<-dat2$M, an error is
> shown as:
> Error in dat2$M : $ operator is invalid for atomic vectors. Kindly help
> what went wrong.
>
> 	[[alternative HTML version deleted]]


what is dat2? or, what do you get if you do:

'class(dat2)'

Jose

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