Hello, I have just started using R, and have found it quite easy to make plots of probability densities 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
On 07/12/2009 11:12 PM, Graham Neubig wrote:> Hello, > > I have just started using R, and have found it quite easy to make > plots of probability densities 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?RSiteSearch("simplex") turns up some simplex plots in the klaR package; I don't know if they're the sort you want. Duncan Murdoch