[BioC] summary.method: mas / combining with vsn

[Hinnerk Boriss]

Hi!

the Tuckey bigweight summary stat method (mas) does no data
transformation when raw values are supplied in the AffyBatch object,
however, it magically transforms the data when they are log or arcsinh
transformed. What transformation is used? Where could I find out myself?
And is there a why (option?) to stop expresso from doing it?

Here my code fragment:

PTNbS.vsn.mas <- expresso(PTNbS.vsn, bg.correct=F, normalize=F,
pmcorrect.method="subtractmm",summary.method="mas")

Cheers,
Hinnerk