Color a delaunay triangulation

I have a delaunay triangulation like the one in attach

. I need to color inside every triangle with a color. I'd like to show the orientation of the triangles. Because I need to highlight the order. Like the second figure

Answer 1

[Fabio Freschi]

Let's suppose that your triangulation is organized as follows

• P: Nx2: node coordinates
• T: Mx3: triangulation
• F: Mx1: scalar field to be plotted, this case orientation

you can plot with the following command

 >> figure;
 >> patch('Faces',T,'Vertices',P,'FaceVertexCData',F,'FaceColor','flat');

Fabio

[Cristina Garozzo]

Hi fabio thank you for the suggestion. I'm trying to use your code like this

%P: Nx2: node coordinates %T: Mx3: triangulation %F: Mx1: scalar field to be plotted, this case orientation

P=[x y]; T=TRI; F=alpha;

figure; patch('Faces',T,'Vertices',P,'FaceVertexCData',F,'FaceColor','flat');* *

But I have this error

Error using patch FaceVertexCData must be an Mx1 vector (indexed colors) or Mx3 matrix (RGB colors)

Error in provacolore2 (line 29) patch('Faces',T,'Vertices',P,'FaceVertexCData',F,'FaceColor','flat');

could you help me?

[Fabio Freschi]

could you post the outputs of the following commands

 >> size(x)
 >> size(TRI)
 >> size(alpha)