Dear Sean, This information does help me a lot. Thank you so much. Regards, Kishor On Tue, Sep 1, 2009 at 3:54 PM, Sean Davis<seandavi at="" gmail.com=""> wrote: > > > On Tue, Sep 1, 2009 at 5:48 AM, Kishor Tappita <kishor.tappita at="" gmail.com=""> > wrote: >> >> Dear All, >> >> I am trying to analyze a Microarray series data using "GEOquery". I >> get the below >> error when trying to extract the information. >> >> > gse = getGEO("GSE15709"); >> > Meta(gse) >> Error in function (classes, fdef, mtable) ?: >> ?unable to find an inherited method for function "Meta", for signature >> "list" >> > GSMList(gse)[[1]] >> Error in function (classes, fdef, mtable) ?: >> ?unable to find an inherited method for function "GSMList", for >> signature "list" >> >> Thanks in advance for your help. >> > > getGEO() defaults to GSEMatrix=TRUE.? Per the documentation, this returns a > list of ExpressionSet objects.? So, gse[[1]] is an ExpressionSet.? The > accessors that you are using above are for returns from calls to getGEO() > with GSEMatrix=FALSE.? Unless there is a specific need to get information > from the full GSE SOFT file, I would recommend staying with GSEMatrix=TRUE > and working with the more standard ExpressionSet object(s). > > Hope that helps. > > Sean > >