Sorry, I should have added library(gplots) in the beginning of my code On Sun, Jan 13, 2013 at 5:04 PM, Uwe Ligges <ligges at statistik.tu-dortmund.de> wrote: >> >> mycol <- colorpanel(n=3,"green","grey","red") - - - Peter K Davidsen | MSc, PhD stud. | Centre for Systems Biology | Univ. of Liverpool | Crown Street | L69 7ZB, UK | cell: +44 (0)7428 950501