Hi, se.exprs(sample.ExpressionSet) gives me some error. It seems that se.exprs is not available. Could you let me know on which object I can call se.exprs? ######### > library(Biobase) Welcome to Bioconductor Vignettes contain introductory material. To view, type 'openVignette()'. To cite Bioconductor, see 'citation("Biobase")' and for packages 'citation(pkgname)'. > data(sample.ExpressionSet) > head(se.exprs(sample.ExpressionSet)) Error in function (classes, fdef, mtable) : unable to find an inherited method for function "se.exprs", for signature "ExpressionSet" Calls: head -> se.exprs -> <anonymous> Execution halted > showMethods('se.exprs') Function: se.exprs (package Biobase) <no methods=""> -- Regards, Peng

On 04/16/2010 07:39 PM, Peng Yu wrote: > Hi, > > se.exprs(sample.ExpressionSet) gives me some error. It seems that > se.exprs is not available. Could you let me know on which object I can > call se.exprs? showMethods('se.exprs') reports this correctly -- there are no (Biobase) classes on which this method is defined. Classes derived from eSet, and defined in other packages (e.g., AffyBatch, in the affy package), may have an se.exprs method. A different question is 'what methods are defined for the data I have?' Martin > > > ######### >> library(Biobase) > > Welcome to Bioconductor > > Vignettes contain introductory material. To view, type > 'openVignette()'. To cite Bioconductor, see > 'citation("Biobase")' and for packages 'citation(pkgname)'. > >> data(sample.ExpressionSet) >> head(se.exprs(sample.ExpressionSet)) > Error in function (classes, fdef, mtable) : > unable to find an inherited method for function "se.exprs", for > signature "ExpressionSet" > Calls: head -> se.exprs -> <anonymous> > Execution halted >> showMethods('se.exprs') > Function: se.exprs (package Biobase) > <no methods=""> > > -- Martin Morgan Computational Biology / Fred Hutchinson Cancer Research Center 1100 Fairview Ave. N. PO Box 19024 Seattle, WA 98109 Location: Arnold Building M1 B861 Phone: (206) 667-2793