surf_test

surf_test, a MATLAB program which calls surf() to demonstrate the display of a 3D surface or contour plot for data of the form Z=F(X,Y).

Licensing:

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

Languages:

surf_test is available in a MATLAB version.

Related Data and Programs:

CONTOUR_GRADIENT, a MATLAB program which displays contours and gradient vectors for a function f(x,y).

CONTOUR_GRADIENT_3D, a MATLAB program which shows how contours and gradient vectors for a function f(x,y) can be displayed in a 3D plot.

LEVELS, a MATLAB library which makes a contour plot of a function Z=F(X,Y), choosing the contour levels using random sampling.

SHORELINE, a MATLAB program which tries to identify and triangulate the 2D domain over which some function f(x,y) is nonnegative.

TEST_INTERP_2D, a MATLAB library which defines test problems for interpolation of regular or scattered data z(x,y), depending on a 2D argument.

VORONOI_MOUNTAINS, a MATLAB program which makes a mountain plot of a Voronoi diagram, that is, a surface plot of the distance from each point to its nearest Voronoi generator.

Source Code:

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

• surf_test01.m displays a surface related to the MATLAB peaks() function, using red to highlight the regions where Z > 1.5.
• timestamp.m is a script which prints prints the YMDHMS date as a timestamp;

• surf_test01_2d.png an "overhead" view of the highlighted region.
• surf_test01_3d.png a 3D view of the highlighted region.