Dear all, This a very simple question: I am using affy to analyze some arrays, and I want to do mva plots. I am trying to change the hybridizations names in the first row of the exprSet, as I dont want to plot the PATH to my CEL files, but just a legend. I have tried to change these names by accessing the elements of the first row in the exprset, but I dont get them. >exprs(L3hRMA)[0,] /home/Genechip/LA_03h_02.CEL /home/Genechip/LA_03h_CBA3_01.CEL /home/Genechip/LM_03h_02.CEL /home/Genechip/LM_03h_CBA3_01.CEL /home/Genechip/MF_03h_02.CEL /home/Genechip/MF_03h_CBA3_01.CEL > exprs(L3hRMA)[0,1] numeric(0) So, what is missing? TIA Christian

the sure way is colnames(l3hRMA@exprs) <- c(1:6) #1:6 is my choice you put what you want rownames(l3hRMA@phenoData@pData) <- c(1:6) it should be as simple as sampleNames(l3hRMA) <- c(1:6) but this isnt implemented yet. On Mon, 12 May 2003, cmprobst wrote: > Dear all, > > This a very simple question: > > I am using affy to analyze some arrays, and I want to do mva plots. > > I am trying to change the hybridizations names in the first row of the > exprSet, as I dont want to plot the PATH to my CEL files, but just a > legend. > > I have tried to change these names by accessing the elements of the > first row in the exprset, but I dont get them. > > >exprs(L3hRMA)[0,] > /home/Genechip/LA_03h_02.CEL /home/Genechip/LA_03h_CBA3_01.CEL > /home/Genechip/LM_03h_02.CEL /home/Genechip/LM_03h_CBA3_01.CEL > /home/Genechip/MF_03h_02.CEL /home/Genechip/MF_03h_CBA3_01.CEL > > > exprs(L3hRMA)[0,1] > numeric(0) > > > So, what is missing? > > TIA > > Christian > > _______________________________________________ > Bioconductor mailing list > Bioconductor@stat.math.ethz.ch > https://www.stat.math.ethz.ch/mailman/listinfo/bioconductor >