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3D plot over triangular grid

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Diego Soler Polo
Diego Soler Polo 2018-6-6
回答： HAMZA NASSAR 2020-1-23
I want to make a 3D plot over a non-rectangular grid. I have vectors X=linspace(0,1,100) and Y=linspace(0,1,100) and I create the typical rectangular grid [x,y]=meshgrid(X,Y). Now I have matrix Z, and I can represent without problems mesh(x,y,Z). The thing is that I only know Z for points (x,y) with y less or equal than x, but never for (x,y) with y greater than x. Therefore, I would like to plot (x,y,Z) but showing only the triangular region of points (x,y) with x and y between 0 and 1 and y less or equal than x. How can I achieve this? Thanks!

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HAMZA NASSAR
HAMZA NASSAR 2020-1-23
use delaunay

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