Hi, I am trying to compare probes from 3 different platforms. What I have done is using matchprobes package. It works well for matching two different platforms. When I try to compare 3 different platforms, it gives error message like this: Error in as.vector(x, "character") : cannot coerce type 'closure' to vector of type 'character' Here are my questions: Can matchprobes be used for more than 2 platforms? It seems no limit from its source codes. Is there any way to make a new probe package from the result of combineAffyBatch in matchprobes package? Is there any other way to compare probes from 3 different platforms? Thank you very much. Best wishes, Kui -- Kui Qian, M.Sc. DNA sequencing and Genomics laboratory, Institute of Biotechnology, Viikinkaari 4 (Cultivator 2) P.O.Box 56 FIN-00014 University of Helsinki [[alternative HTML version deleted]]

Dear Kui As is, the combineAffyBatch function will only combine two datasets. I am not planning to further extend it. In fact, it is part of the matchprobes package, which has been deprecated since Bioconductor 2.4. (For efficient string manipulations, you can now use the Biostrings package, for building a probe package, please see the makeProbePackage vignette in the AnnotationDbi package.) However, please feel free to take its source code and adapt it to your needs. Best wishes Wolfgang > Hi, > > I am trying to compare probes from 3 different platforms. What I have done > is using matchprobes package. It works well for matching two different > platforms. When I try to compare 3 different platforms, it gives error > message like this: > > Error in as.vector(x, "character") : > cannot coerce type 'closure' to vector of type 'character' > > Here are my questions: > Can matchprobes be used for more than 2 platforms? It seems no limit from > its source codes. > Is there any way to make a new probe package from the result of > combineAffyBatch in matchprobes package? > Is there any other way to compare probes from 3 different platforms? > > Thank you very much. > > Best wishes, > Kui -- Wolfgang Huber EMBL http://www.embl.de/research/units/genome_biology/huber/contact