
Hi, there. 
I used the  function read.maimages in limma package to analyze the microarray data .but I got following message 
>RG <- read.maimages(targets$FileName, source="spot")
Error in grep(pattern, x, ignore.case, extended, value, fixed) : 
        invalid argument
I don't know what is the matter 
Thanks a lot
Regards
Shizhu Zang 
Department of Biochemsitry 
Peking UniversityBeijing 
China










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