I used "pd.ragene.1.0.st.v1" to perform a microarray analysis of Affymetrix Rat Gene 1.0ST. Now I need annotation data of the array, then I try this:  

probe_ids <- rat$ID
gene_symbols <- aafSymbol(probe_ids, "pd.ragene.1.0.st.v1.db")
go_categories <- aafGO(probe_ids, "pd.ragene.1.0.st.v1.db")
genbank_accessions <- aafGenBank(probe_ids, "pd.ragene.1.0.st.v1.db")

but this does not work because the file .db does not exist. How can I get the annotation data?

Thanks, Germán

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