delsq_test

delsq_test, a MATLAB code which calls delsq(), which is given a grid G, and returns a corresponding sparse matrix D that defines the Laplacian operator on G. MATLAB includes a built-in version of this function.

Licensing:

Based on code that is copyright 1984-2015 The MathWorks, Inc.

Related Data and Programs:

delsq, a MATLAB code which is given a grid G, and returns a corresponding sparse matrix D that defines the Laplacian operator on G. MATLAB includes a built-in version of this function.

Source Code:

• delsq_test.m, calls all the tests.
• delsq_test.sh, runs all the tests.
• delsq_test.txt, the output file.

• numgrid.m, numbers the nodes used in a grid.

• contour_plot.png, a contour plot of a solution to a boundary value problem.
• delsq_10x10.png, a spy() plot of the nonzeros in a matrix for the Laplacian on a 10x10 grid.
• grid_10x10.png, a spy() plot of the nonzeros in the node index array for a 10x10 grid.
• grid_32x32.png, a spy() plot of the nonzeros in the node index array for a 32x32 grid.
• mesh_plot.png, a mesh plot of a solution to a boundary value problem.