[BioC] Normalize background on marray Agilent object

[Guillermo Marco Puche]

Hello,

I'm currently trying to normalize rBG values for a marray object.
Data origin is Agilent dual channel array. I've loaded information with 
readAgilent() function.

What's the correct way to normalize the data? I would like to normalize 
background information first maNorm function manual isn't very 
clarifying for me.

Thanks !

Best regards,
Guillermo.