[BioC] justRMA => logarithmic data ?

[Heike Pospisil]

Hello Arne,

> yes, the final output from RMA are log2 transformed.

thanks a lot for this reply.

Best wishes,
Heike

> 
> 	Arne
> 
> 
>>-----Original Message-----
>>From: bioconductor-bounces at stat.math.ethz.ch
>>[mailto:bioconductor-bounces at stat.math.ethz.ch]On Behalf Of Heike
>>Pospisil
>>Sent: 18 February 2005 09:29
>>To: bioconductor at stat.math.ethz.ch
>>Subject: [BioC] justRMA => logarithmic data ?
>>
>>
>>Dear list members,
>>
>>I have an additional question concerning my affymetrix analysis.
>>
>>I performed justRMA on 79 CEL-files.
>>
>>data<-justRMA()
>>
>>The resulting expression data range from ~3 to ~14.
>>
>>min(exprs(data))
>>max(exprs(data))
>>
>>Now, only for clarifying, are these values already 
>>logarithmised? I have read 
>>about the thresholds for the golub data that are much larger 
>>(100 and 16,000), 
>>but log2(16000)is ~14 - and so I think, that I have already 
>>logarithmic data. Am 
>>I right?
>>
>>Thanks a lot for your help.
>>
>>Best wishes,
>>Heike
>>-- 
>>Dr. Heike Pospisil
>>Center for Bioinformatics, University of Hamburg
>>Bundesstrasse 43, 20146 Hamburg, Germany
>>phone: +49-40-42838-7303 fax: +49-40-42838-7312
>>
>>_______________________________________________
>>Bioconductor mailing list
>>Bioconductor at stat.math.ethz.ch
>>https://stat.ethz.ch/mailman/listinfo/bioconductor
> 
> 
> 

-- 
Dr. Heike Pospisil
Center for Bioinformatics, University of Hamburg
Bundesstrasse 43, 20146 Hamburg, Germany
phone: +49-40-42838-7303 fax: +49-40-42838-7312