[BioC] MAS 4 in BioC?

[James W. MacDonald]

Axel Rasche wrote:
> Hello,
> 
> Is it possible to normalise Affymetrix chips with MAS 4.0 in BioC/R?
> 
> I would like to reproduce the results in a study. The data has been 
> preprocessed with MAS 4. In the affy-package MAS 5 has been implemented 
> as mas5(). Is there anything like that available for MAS 4?

Not that I know of. However, IIRC, MAS4 was simply the average 
difference, so it would be relatively simple for you to calculate those 
values yourself.

Best,

Jim


> 
> Thanks,
> Axel
> 


-- 
James W. MacDonald
Affymetrix and cDNA Microarray Core
University of Michigan Cancer Center
1500 E. Medical Center Drive
7410 CCGC
Ann Arbor MI 48109
734-647-5623