[BioC] se.exprs

[Rafael A. Irizarry]

the current rma function doesnt return se's. the expresso
implementation of rma does. 

On Wed, 30 Apr 2003, Ann Hess wrote:

> 
> I am having trouble getting standard errors for expressions.  I used the
> following commands:
> 
> data<-ReadAffy(widget=TRUE) (Read in 2 sets of duplicate arrays, 4 total)
> eset<-rma(data)
> se.exprs(eset)
> 
> A matrix (of the appropriate dim) is returned, but all the entries are NA.
> I also tried using the expresso command (for MAS preprocessing) and got
> the same results.
> 
> Any suggestions?
> BTW, are duplicate arrays required in order to get standard errors?
> 
> Thanks,
> 
> Ann
> 
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