(Not recommended) Interpolate from triangle midpoint data to node data
un = pdeprtni(p,t,ut)
un = pdeprtni(p,t,ut) gives
linearly interpolated values at node points from the values at triangle
The geometry of the PDE problem is given by the mesh data
For details on the mesh data representation, see
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
stored as N rows of length nt.
The components of the node data are stored in
un as N columns
of length np.
not inverse functions. The interpolation introduces some averaging.