[BioC] bg.correct.mas

[Ben Bolstad]

> a second thing is, that the 'non pm or mm probes' are not used. can maybe 
> someone give me a hint where to find out what they actually are (grid 
> alignment checkerboards, text, center cross or something like this??) . the 
> reason for the question is, that respecting the 'nonpmormm's i observed a 
> lower mean background estimate.

My reading of the "Statistical Algorithms Description Document", which
is my source material for the , says that control cells are not used in
the calculation of the background.

Thanks,

Ben