**sparse_display_test**,
a C code which
calls sparse_display() to
read information defining a matrix of numbers and display
the sparsity pattern or location of the nonzero elements using
gnuplot.

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

sparse_display, a C code which can read information defining a matrix of numbers and display the sparsity pattern or location of the nonzero elements using gnuplot. This operation is already available in the built-in matlab "spy" command.

- sparse_display_test.c, a sample calling program.
- sparse_display_test.sh, runs all the tests.
- sparse_display_test.txt, the output file.

- wathen_ge_data.txt, data defining the location of the nonzero entries of the Wathen matrix.
- wathen_ge_commands.txt, gnuplot commands to display the data.
- wathen_ge.png, an image of the sparsity pattern for the Wathen matrix.
- before_data.txt, data defining the location of the nonzero entries of a matrix, as created by DEAL.II.
- before_commands.txt, gnuplot commands to display the data.
- before.png, an image of the sparsity pattern for the before matrix.
- after_data.txt, data defining the location of the nonzero entries of a matrix, as created by DEAL.II (after reordering of variables).
- after_commands.txt, gnuplot commands to display the data.
- after.png, an image of the sparsity pattern for the after matrix.
- 20x30_data.txt, data defining the location of the nonzero entries of the 20x30 matrix.
- 20x30_commands.txt, gnuplot commands to display the data.
- 20x30.png, an image of the sparsity pattern for the 20x30 matrix.