[R] type of representation

[allende@gredos.cnb.uam.es]

Hi

I have some data that i want to plot but i don't find how to do it. I have car
types (bmw,renault,mercedes,seat ...), colors and a number for each car
type-color relation.I want to come up with a matrix representation of cars vs
colors where in each intersection i could set a dot proportional in size to my
third variable.


Can anybody give me a clue of hoe to come up with such representation.

Thanks

Ramon