Partial Differential Equation Toolbox |

pdeadworst

Select triangles relative to the worst value

Syntax

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

Description

`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`. For details, see `initmesh`.

`c, a, and f` are PDE coefficients. For details, see `assempde`.

`u` is the current solution, given as a column vector. For details, see `assempde`.

`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)`.

See Also

`adaptmesh`, `pdejmps`

| pdeadgsc |  | pdearcl |