How to create a 3-D ternary plot

I'm trying to create a 3D ternary plot similar to this one:

http://upload.wikimedia.org/wikipedia/en/e/ed/Saddle_Azeotrope.png

I found some code that allows me to make flat ternary plots, but I need to be able to diagram the height for a project. Is it possible to create something like that in matlab?

Answer 1

[Matt Fig]

I don't know of any built-in way to do exactly this in basic MATLAB. It could be done as a custom function, but I don't think it would be a quick and easy undertaking. You might want to search the FEX. Here is one example that showed up (there may be others as well):

http://www.mathworks.com/matlabcentral/fileexchange/2299-ternplot

[David]

that is perfect, thank you very much!

Answer 2

[Paulo Silva]

surf surfc?

[X,Y,Z] = peaks(30);
surfc(X,Y,Z)
colormap hsv
axis([-3 3 -3 3 -10 5])

[Matt Fig]

SURFC (and cousins) will plot a surface, but if you look at the OP's link, the three planes have meaning when viewing the surface. If I were going to make a custom version of such functionality, I would think SURF would be an integral part of it.