**sparse_display_test**,
a MATLAB code which
calls sparse_display(), which
reads 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.

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

sparse_display, a MATLAB 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.m, calls all the tests.
- sparse_display_test.sh, runs all the tests.
- sparse_display_test.txt, the output file.

- sparse_display_test01.m, tests spy_ge().
- r8mat_uniform_01.m, returns a pseudorandom uniform R8MAT.
- wathen_ge.m, sets up the Wathen matrix in GE format.
- wathen_order.m, returns the size of the Wathen matrix.
- 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.
- sparse_display_test02.m, tests spy_file().
- 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.
- 30x20_data.txt, data defining the location of the nonzero entries of the 30x20 matrix.
- 30x20_commands.txt, gnuplot commands to display the data.
- 30x20.png, an image of the sparsity pattern for the 30x20 matrix.