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

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 > > _______________________________________________ > Bioconductor mailing list > Bioconductor@stat.math.ethz.ch > https://www.stat.math.ethz.ch/mailman/listinfo/bioconductor >