Hi, here is a question concerning the file formats to run the pam.train and pam.predict functions. I am not an expert in R and I am having problems in applying these fucntions I have three tabulator delimited text files with my data, labels and names. I have used the read.table function to read the data, and then I have made a list (mylist= list (x=data, y=labels, genenames=names) The summary of this list is something like this: lenght class mode x 25 dataframe list y 25 factor numeric genenames 1 dataframe list But the input to pam-train for x is class none and mode numeric, and for genenames, class none and mode character. I have changed the x arguments with unlist(), but I do not know how to do it with my genenames. Is there anyone on the list familiarised with the pam.train and pam.predict function willing to help me? Thanks a lot Jose Gadea Laboratorio de Genomica IBMCP, UPV-CSIC Av Naranjos s/n 46022 Valencia Spain jgadeav@ibmcp.upv.es