Hello,
I'm using the snapCGH package to analyse human 244k agilent CGH arrays.
targets <- readTargets ("targets.txt")
RG1 <-read.maimages (targets$File_names, source="agilent")
RG2 <- readPositionalInfo (RG1,source="agilent")
 
Unfortunately, when I want to extract chromosome information is appears
that chromosomes 20,21 and 22
are missing from the RG2 obgect
table(RG2$genes$Chr)
2     3     4     5     6     7     8     9    10    11    12    13 
16394 16856 13133 13642 13993 14135 13618 11524 12045 11833 12658 10343
10644 
   14    15    16    17    18    19    23    24 
10687  9327  9041  9013  8058  6391 12085   599 
 
The same results are obtained when directly accessing RG1 object.
Your help would be most appretiated,
Thank you,
Sincerely,
Sergii Ivakhno 

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