[BioC] How to add annotation information?

[Peng Yu]

Hi,

I use the following code to normalized the data. It seems that the
data file has the Affimetrix id. I would like to includes MGI gene
symbol, Entrez gene symbol, gene description in the output file. I am
wondering if there is a way to do so with BioC. What command I should
use?

Regards,
Peng

library(oligo)
data<-read.celfiles(list.celfiles())
eset<-rma(dat)
eset<-rma(data)
write.exprs(eset, file="output.txt", sep="\t")

The data look like the following.

        koA-mth_HZ_5238_MST1_19389.cel  koB-mth_HZ_5238_MST1_19390.cel
 koC-mth_HZ_5238_MST1_19391.cel  koD-mth_HZ_5238_MST1_19392.cel
wt1-mth_HZ_5238_MST1_19385.cel  wt2-mth_HZ_5238_MST1_19386.cel
wt3-mth_HZ_5238_MST1_19387.cel  wt4-mth_HZ_5238_MST1_19388.cel
10344615        7.07210987006919        7.01089258722033
7.26426270000726.92980486555595 7.72857978063884
6.91124431275741        7.457761829613277.21025349865986
10344617        3.02519545040591        3.08697023169755
3.032032340858283.09846420636071        3.12487891156704
3.10727683101607        3.0544609560487 3.03353963677405
10344619        3.20294677833793        3.20612630466463
3.176553031536723.13210443165341        3.1378507207366
3.21452663497659        3.313450502242243.09287042099817