[BioC] as.numeric and NA

[Wolfgang Huber]

Mohammad,

have you tried

	exprs(data.raw) or
	intensity(data.raw)

Also, please consider that the software is written by and the mailing 
list discussions are provided by volunteers. So before posting such a 
question, please consider reading the vignette of the affy package 
first, and perhaps a manual of the R language.

Best wishes
  Wolfgang

Mohammad Esad-Djou wrote:
> Hello, 
> 
> I would like to use for 42 experiments "as.numeric" (objects of type '"numeric"')
> I wrote in such a way:
> 
> 
>>library(affy)
>>data.raw <- ReadAffy(filenames= "./R/ME_cel/Expt1_R1.CEL",
> 
> ...    "./R/ME_cel/Expt14_R3.CEL")
> 
> 
>>as.numeric(sampleNames(data.raw))
> 
>  [1] NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
> [26] NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
> Warning message:
> NAs introduced by coercion
> 
> 
> How can I find correctly numeric values of data.raw?
> 
> Thanks,
> Mohammad Esad-Djou
> 
>


Best regards
   Wolfgang

-------------------------------------
Wolfgang Huber
European Bioinformatics Institute
European Molecular Biology Laboratory
Cambridge CB10 1SD
England
Phone: +44 1223 494642
Fax:   +44 1223 494486
Http:  www.ebi.ac.uk/huber