pwl_approx_1d, a MATLAB code which defines and evaluates a piecewise linear function, using NC control points, which approximates a set of ND data points (x(i),y(i)).
The test code needs access to the test_interp_1d() library.
The information on this web page is distributed under the MIT license.
pwl_approx_1d is available in a C version and a C++ version and a Fortran90 version and a MATLAB version and an Octave version.
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pwl_interp_1d, a MATLAB code which interpolates a set of data using a piecewise linear function.
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vandermonde_approx_1d, a MATLAB code which finds a polynomial approximant to data of a 1D argument by setting up and solving an overdetermined linear system for the polynomial coefficients, involving the Vandermonde matrix.