#acl All:read DanieleMerico:write,delete,revert = Inter-conversion between EntrezGene ID and Symbols = == Code == {{{#!rscript numbers=off library (org.Hs.eg.db) Ann_eg2sy.chv <- unlist (as.list (org.Hs.egSYMBOL)) Ann_sy2eg.chv <- names (Ann_eg2sy.chv) names (Ann_sy2eg.chv) <- Ann_eg2sy.chv # EXAMPLES # From EntrezGene-ID to Symbol Ann_eg2sy.chv["100033460"] # From Symbol to EntrezGene-ID Ann_sy2eg.chv["SNORD115-20"] }}} Note: * use `org.Xx.eg.db` where `Xx` is the species identifier (e.g. `Hs` for human, `Mm` for mouse) * there's lots of of annotation data available in these packages; use `ls ("package:ppp.db")` to see the, where `ppp.db` is the package name, e.g. `org.Hs.eg.db`