Partial Differential Equation Toolbox |

pdeprtni

Interpolate from triangle midpoint data to node data

Syntax

-     un=pdeprtni(p,t,ut)

Description

`un=pdeprtni(p,t,ut)` gives linearly interpolated values at node points from the values at triangle midpoints.

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

Let N be the dimension of the PDE system, np the number of node points, and nt the number of triangles. The components of triangle data in `ut` are stored as N rows of length nt. The components of the node data are stored in `un` as N columns of length np.

Cautionary

`pdeprtni` and `pdeintrp` are not inverse functions. The interpolation introduces some averaging.

See Also

`assempde`, `initmesh`, `pdeintrp`

| pdepoly |  | pderect |