graph/histogram classes

[Scott Christley]

Is anybody aware of an classes available somewhere that can display 
graphs and histograms within GNUstep, as maybe subclasses of NSView?  I 
don't need a lot of functionality but the basics like drawing and 
labeling axes, setting colors, etc.  I would prefer not to have to write 
them, but if I do, would they be something useful to the GNUstep 
community in general?

thanks
Scott