I would like to do: MA.split <- split(MA,factor1) However, because MAlists are formal classes, such a construct doesn't seem to work. Does anyone have an easy of splitting an MAlist like this? Thanks, Sean

>Date: Fri, 28 Jan 2005 07:27:56 -0500 >From: Sean Davis <sdavis2@mail.nih.gov> >Subject: [BioC] Splitting a limma MAlist by a factor >To: Bioconductor <bioconductor@stat.math.ethz.ch> > >I would like to do: > >MA.split <- split(MA,factor1) > >However, because MAlists are formal classes, such a construct doesn't >seem to work. Does anyone have an easy of splitting an MAlist like >this? a <- levels(factor1) x <- list() for (i in a) x[[i]] <- MA[factor1==i,] Gordon >Thanks, >Sean