You can't do this. For example, you have no knowledge of the so-called out of band probes, which are probes measured in the "other" color channel than they were designed for. You are also missing control probes measurements. Perhaps it is easier for you to look at the dimensions of the RGsetEx and MsetEx in the minfiData package to see that you are missing a great deal of numbers. Best, Kasper On Wed, Aug 31, 2016 at 2:53 PM, maden.sean [bioc] <noreply@bioconductor.org> wrote: > Activity on a post you are following on support.bioconductor.org > > User maden.sean <https: support.bioconductor.org="" u="" 8348=""/> wrote Question: > Covert MethylSet to RGChannelSet object > <https: support.bioconductor.org="" p="" 86673=""/>: > > Hi there, > > I'm interested in converting a MethylSet back to an RGChannelSet object > for purposes of preprocessing (I am using unprocessed data obtained from > GEO), but I'm unsure of how to do this. > > My understanding is that preprocessRaw() uses manifest info to associate > idat channels with the correct array probes. I'm not aware of a function > that does this in reverse. I'm thinking it should be possible to do this > manually with a few for loops, but the rownames for getGreen() and getRed() > matrices from the RGChannelSet are numeric identifiers. I am unsure of how > to go about identifying which channels go to which array probe. > > I am running minfi 1.18.6 and Bioconductor 3.3. > > Thanks! > > Sean > > ------------------------------ > > Post tags: minfi, hm450 > > You may reply via email or visit Covert MethylSet to RGChannelSet object >