[BioC] the result of bioconductor not agree with MAS

Ben Bolstad bolstad at stat.berkeley.edu
Thu Mar 6 08:48:17 MET 2003

Hi Lang Chen (and to anyone else this is an issue for),

We have made our best attempts to duplicate the MAS 5.0 algorithm using
available documentation. As you might appreciate, sometimes algorithms
are not as fully documented as one might hope and it is possible that
there are implementation details that Affymetrix uses that are not in
the documentation.

It would be helpful if you could tell us what the level of disagreement

Also it would be most useful to let us know the exact function call you
used to generate your ExprSet to make sure you are really doing what you
think that you are doing.



> Dear all,
> I am a new user of bioconductor. I use MAS function in the Affy package to
> convert CEL file to XLS file. But the result dose not agree with that by MAS
> 5.0. Does anyone ever have such problem and have any advise.
> Any help is greatly appreciated
> Thank you very much 
> Lang Chen
> Research Assistant
> Department of Biostatistics 
> Section on Statistical Genetics
> Ryals Public Health Building, Suite 343A
> University of Alabama at Birmingham
> 1530 3rd Ave S
> Birmingham, Alabama 35294
> Tel 205-9757772
> _______________________________________________
> Bioconductor mailing list
> Bioconductor at stat.math.ethz.ch
> https://www.stat.math.ethz.ch/mailman/listinfo/bioconductor

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