I just have a problem when I do cluster analysis following Bioconductor basics tutorial. The problem happened here: > X <- scale(X) > golubTrainSub <- golubTrain[good, ] > slot(golubTrainSub, "exprs") <- X Error in checkSlotAssignment(object, name, value) : "exprs" is not a slot in class "ExpressionSet" Can anybody tell me how to do it? I used new version of golubEsets (Golub_Train). Thank you very much.TH [[alternative HTML version deleted]]

Hello, you should avoid making direct assignments or calls to slots in ExpressionSet objects, but rather use the provided accessor functions, in your case: exprs(golubTrainSub) <- X Regards, Joern Tadayoshi Hari wrote: > I just have a problem when I do cluster analysis following Bioconductor basics tutorial. The problem happened here: > > >> X <- scale(X) >> golubTrainSub <- golubTrain[good, ] >> slot(golubTrainSub, "exprs") <- X >> > Error in checkSlotAssignment(object, name, value) : > "exprs" is not a slot in class "ExpressionSet" > > Can anybody tell me how to do it? I used new version of golubEsets > (Golub_Train). > > Thank you very much.TH > >