| fft_c2c | Discrete Fourier transforms |
| fft_c2r | Discrete Fourier transforms |
| fft_dct | Discrete cosine and sine transforms |
| fft_dst | Discrete cosine and sine transforms |
| fft_freq | Sample frequencies |
| fft_ishift | Shift the zero frequency to the centre |
| fft_next_len | Fast transform lengths |
| fft_prev_len | Fast transform lengths |
| fft_r2c | Discrete Fourier transforms |
| fft_rfreq | Sample frequencies |
| fft_shift | Shift the zero frequency to the centre |
| fft_stats | Drop-in replacements for stats::fft() and stats::mvfft() |
| fft_workers | Threads per transform |
| local_fft_workers | Threads per transform |
| mvfft_stats | Drop-in replacements for stats::fft() and stats::mvfft() |
| with_fft_workers | Threads per transform |
| zufft_info | Information about the zufft build |