| havefftw {chebpol} | R Documentation |
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.
havefftw()
Returns TRUE if chebpol uses FFTW. Otherwise FALSE.