CHEBYSHEV_INTERP_1D is a MATLAB library which determines the combination of Chebyshev polynomials which interpolates a set of data, so that p(x(i)) = y(i).
CHEBYSHEV_INTERP_1D needs the R8LIB library. The test program needs the TEST_INTERP library.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
CHEBYSHEV_INTERP_1D is available in a C version and a C++ version and a FORTRAN77 version and a FORTRAN90 version and a MATLAB version.
BARYCENTRIC_INTERP_1D, a MATLAB library which defines and evaluates the barycentric Lagrange polynomial p(x) which interpolates a set of data, so that p(x(i)) = y(i). The barycentric approach means that very high degree polynomials can safely be used.
CHEBYSHEV, a MATLAB library which computes the Chebyshev interpolant/approximant to a given function over an interval.
CHEBYSHEV_SERIES, a MATLAB library which can evaluate a Chebyshev series approximating a function f(x), while efficiently computing one, two or three derivatives of the series, which approximate f'(x), f''(x), and f'''(x), by Manfred Zimmer.
CLAUSEN, a MATLAB library which evaluates a Chebyshev approximant to the Clausen function Cl2(x).
DIVDIF, a MATLAB library which uses divided differences to compute the polynomial interpolant to a given set of data.
HERMITE, a MATLAB library which computes the Hermite interpolant, a polynomial that matches function values and derivatives.
LAGRANGE_INTERP_1D, a MATLAB library which defines and evaluates the Lagrange polynomial p(x) which interpolates a set of data, so that p(x(i)) = y(i).
NEAREST_INTERP_1D, a MATLAB library which interpolates a set of data using a piecewise constant interpolant defined by the nearest neighbor criterion.
NEWTON_INTERP_1D, a MATLAB library which finds a polynomial interpolant to data using Newton divided differences.
PWL_INTERP_1D, a MATLAB library which interpolates a set of data using a piecewise linear interpolant.
R8LIB, a MATLAB library which contains many utility routines using double precision real (R8) arithmetic.
RBF_INTERP_1D, a MATLAB library which defines and evaluates radial basis function (RBF) interpolants to 1D data.
SHEPARD_INTERP_1D, a MATLAB library which defines and evaluates Shepard interpolants to 1D data, which are based on inverse distance weighting.
SPLINE, a MATLAB library which constructs and evaluates spline interpolants and approximants.
TEST_INTERP, a MATLAB library which defines a number of test problems for interpolation, provided as a set of (x,y) data.
TEST_INTERP_1D, a MATLAB library which defines test problems for interpolation of data y(x), depending on a 2D argument.
VANDERMONDE_INTERP_1D, a MATLAB library which finds a polynomial interpolant to a function of 1D data by setting up and solving a linear system for the polynomial coefficients, involving the Vandermonde matrix.
The program plots a piecewise linear interpolant to the original data, and the Chebyshev interpolant.
You can go up one level to the MATLAB source codes.