havefftw

<p>It is possible to compile chebpol without FFTW.  If this is done, it will
not be feasible with high-degree Chebyshev polynomials.  I.e. a 100x100x100
approximation will be possible, but not a one-dimensional 1000000.  This
function checks whether chebpol uses FFTW.</p>

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.

havefftw: Check whether chebpol uses FFTW

Description

Usage

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