| Chapter Introduction | |
| Module 7.1: nag_fft - Discrete Fourier transforms | |
| nag_fft_1d | Single or multiple 1-d complex discrete Fourier transform, or its inverse |
| nag_fft_1d_real | Single or multiple 1-d real or Hermitian discrete Fourier transform, or its inverse |
| nag_fft_1d_basic | Single or multiple 1-d real, Hermitian or complex discrete Fourier transform. The transform is overwritten on the input data |
| nag_fft_2d | 2-d complex discrete Fourier transform, or its inverse |
| nag_fft_2d_basic | 2-d complex discrete Fourier transform. The transform is overwritten on the input data |
| nag_fft_3d | 3-d complex discrete Fourier transform, or its inverse |
| nag_fft_trig | Trigonometric coefficients for computing discrete Fourier transforms |
| nag_herm_to_cmplx | Convert Hermitian sequences to general complex sequences |
| nag_cmplx_to_herm | Convert Hermitian complex sequences to their compact real form |
| nag_conj_herm | Complex conjugates of Hermitian sequences |
| Module 7.2: nag_sym_fft - Symmetric discrete Fourier transforms | |
| nag_fft_sin | Single or multiple 1-d discrete Fourier sine transform |
| nag_fft_cos | Single or multiple 1-d discrete Fourier cosine transform |
| nag_fft_qtr_sin | Single or multiple 1-d discrete quarter-wave Fourier sine transform, or its inverse |
| nag_fft_qtr_cos | Single or multiple 1-d discrete quarter-wave Fourier cosine transform, or its inverse |
| Module 7.3: nag_conv - Convolution and correlation | |
| nag_fft_conv | Computes the convolution or correlation of two real or complex vectors |