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Eitan Halper-Stromberg
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30
@eitan-halper-stromberg-1310
Last seen 10.3 years ago
Hi,
I am trying to speed up my mas5 processing by using justMAS on my
affybatch. My AffyBatch is made of 8 chips and the cdf for these
chips is hgu133a. I have tested justMAS by running it several times
on this affybatch and I am obtaining different expression measure
results even though I am doing the exact same command. My affybatch
is called 'F' and an array of geneNames is called 'gn', and I type:
> j<-justMAS(F)
> j at exprs[gn=="1007_s_at"]
1007_s_at <na> <na> <na> <na> <na>
<na> <na>
6.603113 6.171309 6.399581 6.171309 6.171309 6.171309 6.171309
6.036457
> i<-justMAS(F)
> i at exprs[gn=="1007_s_at"]
1007_s_at <na> <na> <na> <na> <na>
<na> <na>
6.603113 NaN 6.171309 5.482231 6.171309 5.438713 5.387300
7.311159
Does anybody know why I am getting this discrepancy?
I am running the justMAS function from the simpleaffy library. On
another note, it also appears that the mas5 function is giving me
enigmatic results in the same fashion as just stated.
-Eitan