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# pdetriq

Triangle quality measure

q = pdetriq(p,t)

## Description

q = pdetriq(p,t) returns a triangle quality measure given mesh data.

The triangular mesh is given by the mesh data p, e, and t. For details on the mesh data representation, see initmesh.

The triangle quality is given by the formula

$q=\frac{4a\sqrt{3}}{{h}_{1}^{2}+{h}_{2}^{2}+{h}_{3}^{2}}$

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 h1 = h2 = h3.

## References

Bank, Randolph E., PLTMG: A Software Package for Solving Elliptic Partial Differential Equations, User's Guide 6.0, Society for Industrial and Applied Mathematics, Philadelphia, PA, 1990.

## See Also

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