Hi

i have two arrays of genes names,one with180000 gene names and the other with 24000 gene names,I have to compare both of them for finding common names.

I have both the arrays in .csv format.i loaded the files and tried to compare them using for and if loops

but I got the error Error in Ops.factor(cgh[i, 1], cgh[j, 2]) : 
        level sets of factors are different

Please suggest me how to solve this problem or any other alternative procedure

Thanks
ramakanth




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