Hi. I have generated a heatplot and also added a colour bar (using "classvec") under the dendrogram that clusters the column subjects. These subjects are divided into four groups, each with a different colour. I have been trying to find a way to reorder the dendrogram by rotating some of the branches so that the colours on the colour bar group together a bit better (just for visual display). "Colv" seems to fit that purpose, but I can't get it to work. Any suggestions or alternative solutions would be much appreciated. - Hugh Harris [[alternative HTML version deleted]]