GSEABase how to map gene symbols to mouse EntrezId or Affy

Hi

Any suggestions how to map  gene symbols to mouse EntrezId(preffered) or
Affy. 
mapping to Entez apparently is not supported by GSEABase
> mapIdentifiers(gss,EntrezIdentifier())
Error in .mapIdentifiers_isMappable(from, to) : 
  unable to map from 'Symbol' to 'EntrezId'
    neither GeneIdentifierType has annotation
Error in GeneSetCollection(lapply(what, mapIdentifiers, to, ..., verbose
= verbose)) : 
  error in evaluating the argument 'object' in selecting a method for
function 'GeneSetCollection'

 
Mapping to Affys works for human, but not for mouse
> mapIdentifiers(gss, AnnotationIdentifier("hgu95av2.db"))
GeneSetCollection
  names: chr5q23, chr16q24 (2 total)
  unique identifiers: 35089_at, 35090_g_at, ..., 35807_at (79 total)
  types in collection:
    geneIdType: AnnotationIdentifier (1 total)
    collectionType: BroadCollection (1 total)
> mapIdentifiers(gss, AnnotationIdentifier("mouse4302.db"))
GeneSetCollection
  names: chr5q23, chr16q24 (2 total)
  unique identifiers:  (0 total)
  types in collection:
    geneIdType: AnnotationIdentifier (1 total)
    collectionType: BroadCollection (1 total)
> 

 
Thanks

Vladimir Morozov 

	[[alternative HTML version deleted]]

_______________________________________________
Bioconductor mailing list
Bioconductor@...
https://stat.ethz.ch/mailman/listinfo/bioconductor
Search the archives: http://news.gmane.org/gmane.science.biology.informatics.conductor