test_interp_fun, a MATLAB code which provides the values of certain functions that are useful for testing an interpolation algorithm using a varying number of points.
The related packages TEST_INTERP and TEST_APPROX provide discrete data sets of (x,y) pairs. However, when the convergence rate of an interpolation process is of interest, it is important to be able to sample an underlying but "unknown" function at an increasing number of points. This library provides a few functions which are known to cause problems for certain kinds of interpolation schemes.
The problems available include:
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
test_interp_fun is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version.
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