shepard_interp_nd, a C code which defines and evaluates Shepard interpolants to multidimensional data, based on inverse distance weighting.
The code needs the R8LIB library. The test needs the TEST_INTERP_ND library.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
shepard_interp_nd is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version.
LAGRANGE_INTERP_ND, a C code which defines and evaluates the Lagrange polynomial p(x) which interpolates a set of data depending on a multidimensional argument x that was evaluated on a product grid, so that p(x(i)) = z(i).
R8LIB, a C code which contains many utility routines using double precision real (R8) arithmetic.
RBF_INTERP_ND, a C code which defines and evaluates radial basis function (RBF) interpolants to multidimensional data.
SHEPARD_INTERP_1D, a C code which defines and evaluates Shepard interpolants to 1D data, which are based on inverse distance weighting.
SHEPARD_INTERP_2D, a C code which defines and evaluates Shepard interpolants to 2D data, which are based on inverse distance weighting.
SPARSE_INTERP_ND a C code which can be used to define a sparse interpolant to a function f(x) of a multidimensional argument.
TEST_INTERP_ND, a C code which defines test problems for interpolation of data z(x), depending on an M-dimensional argument.