**spiral_data_test**,
a MATLAB program which
calls spiral_data() to sample a velocity vector field that satisfies the
continuity equation, and write the nodes and velocities to a file,
suitable for display using GNUPLOT.

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

spiral_data, a MATLAB library which computes a velocity vector field that satisfies the continuity equation, writing the data to a file that can be plotted by gnuplot.

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

- spiral_data_test01.m, samples the flow and reports the range.
- spiral_data_test02.m, samples the flow and reports the residual.
- spiral_data_test03.m, evaluates the flow on a grid and writes GNUPLOT plot files.
- spiral_data_test04.m, evaluates the flow on a grid and calls Matlab's QUIVER function.
- spiral_data_data.txt, data for GNUPLOT.
- spiral_data_commands.txt, commands for GNUPLOT.
- spiral_data.png, the resulting plot.
- spiral_quiver.png, the resulting QUIVER plot.