[BioC] as.numeric and NA

[Mohammad Esad-Djou]

Thank you for your answer.  

> have you tried
> 
> 	exprs(data.raw) or
> 	intensity(data.raw)
> 
Yes, I already tried exprs(data.raw).  
Unfortunately does not help me. I simplified my question, so that it can be answered concretely.
I will read again R manual. 

best Regards,
Mohammad



Wolfgang Huber <huber at ebi.ac.uk> schrieb am 30.05.05 13:18:38:
> 
> Mohammad,
> 
> 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
> -------------------------------------