the .cl is not a problem. It can be generate with the line >rep(c(1,0), c(10,7)) for unpaired data with 10 cases and 7 controls: [1] 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 you can direct this line to a vector with vectro.cl <-rep(c(1,0), c(10,7)). But i would still like to knoe how to generate the .gnames file, wh?re all the gene names are stroed. -- Assa Yeroslaviz L?tzenerstr. 15 51373 Leverkusen

the .cl is not a problem. It can be generate with the line >rep(c(1,0), c(10,7)) for unpaired data with 10 cases and 7 controls: [1] 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 you can direct this line to a vector with vectro.cl <-rep(c(1,0), c(10,7)). But i would still like to knoe how to generate the .gnames file, wh?re all the gene names are stroed. -- Assa Yeroslaviz L?tzenerstr. 15 51373 Leverkusen