Dear All, I analyse my datas using marray and limma packages, with yours helps, sure! Thanks very much! Now, I have the differentially expressed genes and I would want to have a dendrogram of these genes. Like this: |--------Gene1 ---| | |--Gene2 |-----| |--Gene10 Is it possible make this? What packages I use for this? All tips and helps are welcome. Thanks very much Marcelo