I have 4 data points, and a list of pair-wise distances between the points. I want to produce a visual plot of the distances between the points. Since I need to do this in 2 dimensions, and the figure generated is a 3-dimensional irregular tetrahedron, I need an approximation. Does anybody know of a suitable package or algorithm? I suspect such a package would use either using spring-approximation, or direct computation, I don't mind. I'd like a pretty picture as output for a customer.