Wrapper for 'FFTW3' Includes: One-Dimensional Univariate, One-Dimensional Multivariate, and Two-Dimensional Transform

fftw | Compute fft using fftw3 |

fftw2d | Compute a two-dimensional FFT on a matrix using FFTW3 |

mvfftw | Compute the FFT on each column of a matrix using FFTW3 |

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