Hi there,

I have been trying to use AffyQCReport for a few days now and I keep  
having the same problem again and again.

I load the package with the usual library(affy) and  
library(affyQCReport) commands, so I type then the next command  
obtaining an error as a result.

 > QCReport(test,file="qualityReport.pdf")

Error in as.double(y) :
   cannot coerce type 'S4' to vector of type 'double'

When checking in my working directory, I find a pdf file with only the  
first two pages of any AffyQCReport.

It seems odd because some other people at my centre has tried to do  
the same analysis, and got the same error.

Would you know which the cause would be?

Thanks,
Lorenzo


Lorenzo Melchor, PhD
Mammary Stem Cell Team
The Breakthrough Breast Cancer Research Centre (ICR)
237 Fulham Road
SW3 6JB
lorenzo.melchor@icr.ac.uk





The Institute of Cancer Research: Royal Cancer Hospital, a charitable Company Limited by Guarantee, Registered in England under Company No. 534147 with its Registered Office at 123 Old Brompton Road, London SW7 3RP.

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