search for: dirichlet_distribut

...ensities for normal and beta distributions, etc. Now, I'm looking at trying to make a simplex plot of a Dirichlet density, but have gotten stuck and was hoping that someone could help. Ideally, the plot would look something like the 3d plots on Wikipedia here: http://en.wikipedia.org/wiki/File:Dirichlet_distributions.png Although if these are impossible, a color-coded 2d simplex would work as well. Does anyone have an idea or link about how to make simplex plots? Thanks in advance, Graham