**grids_display_test**,
a MATLAB code which
calls grids_display(), which
reads two ASCII
files defining grids or sparse grids in 2D or 3D. The first grid is
plotted "lightly", in hollow blue dots, while the second is plotted
with solid red dots. The image is automatically
saved to a PNG file.

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

grids_display, a MATLAB code which reads two files of grids or sparse grids, displays the first with hollow blue dots, the second with red dots.

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

A 2D example which illustrates how a Clenshaw Curtis sparse grid of level 4 is the sum of 5 Clenshaw Curtis product grids:

- cc_d2_level4_x.txt, the coordinates of points in a Clenshaw Curtis sparse grid of level 4.
- cc_d2_o17x1_x.txt, the coordinates of points in a Clenshaw Curtis 17x1 product grid.
- level4_o17x1.png, a plot with the level 4 points in hollow blue and the 17x1 points in solid red.
- cc_d2_o9x3_x.txt, the coordinates of points in a Clenshaw Curtis 9x3 product grid.
- level4_o9x3.png, a plot with the level 4 points in hollow blue and the 9x3 points in solid red.
- cc_d2_o5x5_x.txt, the coordinates of points in a Clenshaw Curtis 5x5 product grid.
- level4_o5x5.png, a plot with the level 4 points in hollow blue and the 5x5 points in solid red.
- cc_d2_o3x9_x.txt, the coordinates of points in a Clenshaw Curtis 3x9 product grid.
- level4_o3x9.png, a plot with the level 4 points in hollow blue and the 3x9 points in solid red.
- cc_d2_o1x17_x.txt, the coordinates of points in a Clenshaw Curtis 1x17 product grid.
- level4_o1x17.png, a plot with the level 4 points in hollow blue and the 1x17 points in solid red.