VonC
                   2008-11-06 09:22:42
                
              
                
                A: 
                
              it may do what i'm after, but I can't afford to pay US$4500 for it. Not the in academic setting I work in.
                  Dan
                   2008-11-06 09:27:55
                I understand totally :) Still looking for alternatives
                  VonC
                   2008-11-06 09:29:40
                
                +1 
                A: 
                
                
              
              I did this quite recently. Pretty simple, really. I can send you the code to draw the base grid, and the rest is just a series of histograms (Polygons) with an offset between each layer.