grids_display

grids_display, an Octave code which can read 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.

Usage:

grids_display ( 'file_name1', 'file_name2', rmin, rmax )

• 'file_name1' is the file containing the first grid, to be shown in hollow blue.
• 'file_name2' is the file containing the second grid, to be shown in solid red.
• rmin, rmax are the range in X, Y (and possibly Z) over which the plot is to be displayed. This is typically either [-1,1] or [0,1]. Some grids don't include points on the boundary, so it is useful to be able to specify the plot range, and thus force the boundaries to show up, and to show up "in the same place" for multiple plots. Also, this feature allows you to zoom in on part of the grid, if you wish.

Licensing:

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

Languages:

grids_display is available in a MATLAB version and an Octave version.

Related Data and Programs:

grids_display_test

cc_display, an Octave code which displays points on various grids derived from the Clenshaw Curtis rule.

circle_grid_display, an Octave code which reads a matrix of integers, and draws a corresponding grid of circles filled with color.

gl_display, an Octave code which displays points on various grids derived from the Gauss-Legendre rule.

grid_display, an Octave code which reads a file of points on a grid or sparse grid, displays the grid and saves the image in a PNG file;

gridlines, an Octave code which gives the user more control over drawing gridlines on a graph than the builtin "grid on" command.

quadrature_rules, a dataset directory which contains quadrature rules; a number of examples of sparse grid quadrature rules are included.

tensor_grid_display, an Octave code which can display the grid points of a tensor product rule used for interpolation or quadrature, in 1D, 2D or 3D.

Source Code:

• grids_display.m, the source code.