Contains methods for creating multivariate Chebyshev
approximation of functions on a hypercube. Some methods for
non-Chebyshev grids are also provided.

Contains methods for creating multivariate Chebyshev
interpolations of functions on a hypercube. If available through fftw3, the DCT-II/FFT
is used to compute the coefficients, so it is reasonably fast. Some interpolation methods for
multivariate non-Chebyshev grids are also provided, as well as polyharmonic
splines with a linear term.

Contains methods for creating multivariate Chebyshev
interpolations of functions on a hypercube. If available through fftw3, the DCT-II/FFT
is used to compute the coefficients, so it is reasonably fast. Some interpolation methods for
multivariate non-Chebyshev grids are also provided, a multilinear, and the Floater-Hormann barycenter method,
as well as polyharmonic splines with a linear term.

person("Simen", "Gaure", email="Simen.Gaure@frisch.uio.no", role=c("aut","cre"),
comment="Ragnar Frisch Centre for Economic Research")
Contains methods for creating multivariate
interpolations of functions on a hypercube. If available through fftw3, the DCT-II/FFT
is used to compute coefficients for a Chebyshev interpolation.
Other interpolation methods for arbitrary Cartesian grids are also provided, a piecewise multilinear,
and the Floater-Hormann barycenter method. For scattered data polyharmonic splines with a linear term
is provided. The time-critical parts are written in C for speed. All interpolants are parallelized if
used to evaluate more than one point.
Simen Gaure [aut, cre] (Ragnar Frisch Centre for Economic Research)

person("Simen", "Gaure", email="Simen.Gaure@frisch.uio.no", role=c("aut","cre"),
comment=c(ORCID="https://orcid.org/0000-0001-7251-8747"))
Contains methods for creating multivariate/multidimensional
interpolations of functions on a hypercube. If available through fftw3, the DCT-II/FFT
is used to compute coefficients for a Chebyshev interpolation.
Other interpolation methods for arbitrary Cartesian grids are also provided, a piecewise multilinear,
and the Floater-Hormann barycenter method. For scattered data polyharmonic splines with a linear term
is provided. The time-critical parts are written in C for speed. All interpolants are parallelized if
used to evaluate more than one point.