**fem2d_sample_test**,
a C++ program which
calls fem2d_sample(), which
evaluates a finite element function of a 2D argument.

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

fem2d_sample, a C++ program which evaluates a finite element method (FEM) function defined on an order 3 or order 6 triangulation of a 2D region.

- fem2d_sample_test.sh, runs all the tests.
- fem2d_sample_test.txt, the output file.

**SQ** is FEM data for the function f(x,y)=x^2+y^2, on a 5x5 grid
of nodes, organized into linear triangles. The sample data seeks the values
of this function on a 4x4 evenly spaced grid.

- fem_sq_nodes.txt, defines the FEM nodes.
- fem_sq_elements.txt, defines the FEM elements.
- fem_sq_values.txt, defines the FEM nodal values.
- sample_sq_nodes.txt, defines the sample nodes.
- sample_sq_values.txt, defines the sample nodal values.