In reply to B. Hein.

Yes, although I find that combining the two can result in a crowded graph. You could print the table of values in case he asks. If you decide that you want the labels displayed on the heat map, you need to write the GTL template. See the article "Designing a quantile bin plot." You can download the program that creates those plots. Although none of them are exactly what you need, they should get you started.