R: Check whether chebpol uses FFTW

havefftw {chebpol} | R Documentation

## Check whether chebpol uses FFTW

### Description

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.

### Usage

    havefftw()

### Value

Returns TRUE if chebpol uses FFTW. Otherwise FALSE.

[Package chebpol version 2.1-2 Index]