Hi, I am trying to plot 2 plots in the same PDF. The plot are 2 identical dendrograms except for the leave's label (some labels are empty). I would like to plot the first one in red and the second one in black. The idea I have is to use the second one as a mask hiding the red dendrogram on the common part. > class(dend1) [1] "dendrogram" > class(dend2) [1] "dendrogram" ##### Here the plot are merged but everything is red > pdf(file="color_dendrogram.pdf", height=100, width=400) > plot(dend2, col="red", panel.last=plot(dend1, col="black")) > dev.off() ##### Here the plot are merged but everything is black... > plot(dend2, panel.first=par(col="red"), panel.last=plot(dend1, panel.first=par(col="black"))) The final graph should be black (from dend1) and some of the label red (from dend2). David > sessionInfo() R version 2.7.0 (2008-04-22) x86_64-unknown-linux-gnu locale: C attached base packages: [1] tools stats graphics grDevices utils datasets methods [8] base other attached packages: [1] lattice_0.17-6 bioDist_1.10.0 Biobase_2.0.1 loaded via a namespace (and not attached): [1] grid_2.7.0

try: > pdf(file="color_dendrogram.pdf", height=100, width=400) > plot(dend2, col="red") > plot(dend1, col="black", add=T) > dev.off() ----------------------------------------- This email was sent from ATLAS Biolabs GmbH, Koeln/Cologne & Berlin. Sitz der Gesellschaft/Registered Office: Koeln/Cologne, Germany. Registergericht/Commercial Register Koeln/Cologne No HRB 59119, USt- IdNr: DE251633620 Diese E-Mail kann Betriebs- oder Geschaeftsgeheimnisse oder sonstige vertrauliche Informationen enthalten. Sollten Sie diese E-Mail irrtuemlich erhalten haben, ist Ihnen eine Kenntnisnahme des Inhalts, eine Vervielfaeltigung oder Weitergabe der E-Mail ausdruecklich untersagt. Bitte benachrichtigen Sie uns und vernichten Sie die empfangene E-Mail. Vielen Dank. This e-mail may contain trade secrets or privileged, undisclosed, or otherwise confidential information. If you have received this e-mail in error, you are hereby notified that any review, copying, or distribution of it is strictly prohibited. Please inform us immediately and destroy the original transmittal. Thank you for your cooperation.