[BioC] heatmap() customization

[Straubhaar, Juerg]

If I have a small number of experiments heatmap() uses the default width to display the graph. In this case I would like to make the color rectangles narrower or thinner. In other words I would like to control the dimensions of the graph. How do I do that. Which line in the heatmap() function do I have to change or what parmeters can I set to achieve this result. 

Thank your for your help.

Juerg Straubhaar
UMass Med School