pdeadworst (Partial Differential Equations Toolbox)

Select triangles relative to the worst value.

bt=pdeadworst(p,t,c,a,f,u,errf,wlevel)

bt=pdeadworst(p,t,c,a,f,u,errf,wlevel)

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. See the entry on initmesh for more details.

c, a, and f

are PDE coefficients. See the entry on assempde for details.

is the current solution, given as a column vector. See the entry on assempde for details.

errf

is the error indicator, as calculated by pdejmps.

wlevel

is the error level relative to the worst error. wlevel must be between 0 and 1.

Triangles are selected using the criterion errf>wlevel*max(errf).