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(Not recommended) Select triangles using relative tolerance criterion

pdeadgsc is not recommended.


bt = pdeadgsc(p,t,c,a,f,u,errf,tol)


bt = pdeadgsc(p,t,c,a,f,u,errf,tol) returns indices of triangles to be refined in bt. Used from adaptmesh to select the triangles to be further refined. The geometry of the PDE problem is given by the mesh data p and t. For more details, see Mesh Data as [p,e,t] Triples.

c,a, and f are PDE coefficients.

u is the current solution, given as a column vector.

errf is the error indicator, as calculated by pdejmps.

tol is a tolerance parameter.

Triangles are selected using the criterion errf>tol*scale, where scale is calculated as follows:

Let cmax, amax, fmax, and umax be the maximum of c, a, f, and u, respectively. Let l be the side of the smallest axis-aligned square that contains the geometry.

Then scale = max(fmax*l^2,amax*umax*l^2,cmax*umax). The scaling makes the tol parameter independent of the scaling of the equation and the geometry.

See Also

Introduced before R2006a