Partial Differential Equation Toolbox |

pdetrg

Triangle geometry data

Syntax

-     [ar,a1,a2,a3]=pdetrg(p,t)
      [ar,g1x,g1y,g2x,g2y,g3x,g3y]=pdetrg(p,t)

Description

`[ar,a1,a2,a3]=pdetrg(p,t)` returns the area of each triangle in `ar` and half of the negative cotangent of each angle in `a1`, `a2`, and `a3`.

`[ar,g1x,g1y,g2x,g2y,g3x,g3y]=pdetrg(p,t)` returns the area and the gradient components of the triangle base functions.

The triangular mesh of the PDE problem is given by the mesh data `p` and t. For details on the mesh data representation, see `initmesh`.

| pdetool |  | pdetriq |