The following two steps are useful for checking the quality of a triangular mesh in certain cases:
1) PDE Toolbox offers functions to measure the quality of the triangular mesh according to this formula:
-- 4*sqrt(3)*a
q= ---------------,
h1^2+h2^2+h3^2
where 'a' is the area and 'h1', 'h2', and 'h3' the side lengths of the triangle. If q>0.6, the triangle is of acceptable quality. q=1 when h_1=h_2=h_3.
You can use the PDETRIQ function to check the quality of the mesh. If P is the point matrix, E is the edge matrix and T is the mesh matrix, then Q is the measure of the quality of all the triangle.
Q= pdetriq(P,T);
%You can plot the quality using PDEPLOT
pdeplot(P,E,T,'xydata',Q)
2) If you are not satisfied with the quality, use JIGGLEMESH and REFINEMESH to refine your mesh quality. For more information on this command, please type "help refinemesh" at the MATLAB command prompt.
