Thank you all, 

Using bioclite to download the annotation fixed the problem.

Now, I am getting into simpler R problem. I have an exprSet object  of 4
arrays:
> eset
Expression Set (exprSet) with
        18952 genes
        4 samples
                 phenoData object with 1 variables and 4 cases
         varLabels
                sample: arbitrary numbering

My goal is to draw a boxplot of the 4 different samples. Surely I can do:
>boxplot (exprs(eset)[,1], exprs(eset)[,2], exprs(eset)[,3], exprs(eset)[,4],
col=c(2,3,4,5))

But is there an easier way to do with without having to subscript each
individual column? [right now I have only 4 but when I will have 20, Išll
get bored quite rapidly]

Sorry if this sounds easy, I am still learning the basics of R

Marco 
______________________________
Marco Blanchette, Ph.D.

mblanche@uclink.berkeley.edu

Donald C. Rio's lab
Department of Molecular and Cell Biology
16 Barker Hall
University of California
Berkeley, CA 94720-3204

Tel: (510) 642-1084
Cell: (510) 847-0996
Fax: (510) 642-6062
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