**triangulation_order3_contour_test**,
a MATLAB code which
calls triangulation_order3_contour(), which
reads datafiles describing a set of nodes, their triangulation, and the
value of a scalar quantity at each node, and create a color
contour plot of the scalar.

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

triangulation_order3_contour, a MATLAB code which makes a contour plot of scattered data, or of data defined on an order 3 triangulation.

- triangulation_order3_contour_test.m, calls all the tests.
- triangulation_order3_contour_test.sh, runs all the tests.
- triangulation_order3_contour_test.txt, the output file.

**CHANNEL** is a channel region 3 units wide and 1 unit high.
A Stokes flow solver has computed the fluid velocity and pressure
in the channel. The pressure is a scalar and can be plotted
by this routine.

- channel_nodes.txt, a node file;
- channel_elements.txt, an element file;
- channel_values.txt, a value file;
- channel_contours.png, a PNG image of the interpolated contour plot of the data;

**ELL** is an L-shaped region.

- ell_nodes.txt, a node file;
- ell_elements.txt, an element file;
- ell_values.txt, a value file;
- ell_triangulation.png, a PNG image of the triangulation;
- ell_contours.png, a PNG image of the interpolated contour plot of the data;

**ELL2** is the same as ELL, except we do not supply the elements.
The program will work just the same, except it will compute triangular
elements internally, and write a copy out as a file.

- ell2_nodes.txt, a node file;
- ell2_values.txt, a value file;

**LAKE** is a simulated lake with an island region.

- lake_nodes.txt, a node file;
- lake_elements.txt, an element file;
- lake_values.txt, a value file;
- lake_triangulation.png, a PNG image of the triangulation;
- lake_contours.png, a PNG image of the interpolated contour plot of the data;