I have seen such plots simply done on a triangle. Of course this was in the case that x+y+z=1 and x >= 0, y >= 0, and z >= 0. I thought that it was pretty clear what was happening in the problem. These were plots of the dynamics of bi-linear operators if I remember correctly.
At 5:15 AM 96/8/16, Michael Friendly wrote: >I'm looking for ideas on how to do trilinear plots, ie, plots >on three axes which form an equilateral triangle (where the three coords are >usually scaled so they sum to 1 for each observation)? > >Equivalently, this plot can be described as a plot of the locations of 3D >points in the plane defined by x+y+z=1.