[BioC] Trying to convert to ExpressionSet object problems

[Robert Gentleman]

Since you did not follow the posting guide and provide us with the 
output of sessionInfo (or just about any other detail that would help 
someone that is not looking directly over your shoulder) it is a bit 
hard to know if it is surprising or not - my guess is that it is not...


Daniel Brewer wrote:
> Hello,
> 
> I am having trouble converting an exprSet to an ExpressionSet.
> 
>> U95B <- justGCRMA()
> ... Add various bits to the pheno data and change the name of the samples
>> class(U95B)
> [1] "exprSet"
> attr(,"package")
> [1] "Biobase"
>> U95B <- as(U95B,"ExpressionSet")
> Error in validObject(.Object) : invalid class "ExpressionSet" object:
> featureNames differ between AssayData members
> 
> Anyone got any ideas what that means and how to fix it?  Also isn't it a
> bit odd that justGCRMA produces the old type of object?
> 
> Thanks

-- 
Robert Gentleman, PhD
Program in Computational Biology
Division of Public Health Sciences
Fred Hutchinson Cancer Research Center
1100 Fairview Ave. N, M2-B876
PO Box 19024
Seattle, Washington 98109-1024
206-667-7700
rgentlem at fhcrc.org