I have a micro array experiment, I am going to pre-process it using the MAS 5.0 algorithm and align to build a matrix in the 'R' then Probe sets that were found 'absent' on ≥ 10 % of microarray chip to will be omitted from further analysis (i don't know how do this also). I installed R....
Right now after hours searching, I got fully puzzled, please don't leave me alone in this step
You will need to provide more information and ask a specific question if you want some help. Show some data and where you are getting stuck with a specific command or problem.