Transforms
REAL TRIGONOMETRIC FFT
| ROUTINE | DESCRIPTION |
|---|---|
| FAST_DFT | Computes the Discrete Fourier Transform of a rank-1 complex array, x. |
| FAST_2DFT | Computes the Discrete Fourier Transform (2DFT) of a rank-2 complex array, x. |
| FAST_3DFT | Computes the Discrete Fourier Transform (2DFT) of a rank-3 complex array, x. |
| FFTRF | Computes the Fourier coefficients of a real periodic sequence. |
| FFTRB | Computes the real periodic sequence from its Fourier coefficients. |
| FFTRI | Computes parameters needed by FFTRF and FFTRB. |
COMPLEX EXPONENTIAL FFT
| ROUTINE | DESCRIPTION |
|---|---|
| FFTCF | Computes the Fourier coefficients of a complex periodic sequence. |
| FFTCB | Computes the complex periodic sequence from its Fourier coefficients. |
| FFTCI | Computes parameters needed by FFTCF and FFTCB. |
REAL SINE AND COSINE FFTS
| ROUTINE | DESCRIPTION |
|---|---|
| FSINT | Computes the discrete Fourier sine transformation of an odd sequence. |
| FSINI | Computes parameters needed by FSINT. |
| FCOST | Computes the discrete Fourier cosine transformation of an even sequence. |
| FCOSI | Computes parameters needed by FCOST. |
REAL QUARTER SINE AND QUARTER COSINE FFTS
| ROUTINE | DESCRIPTION |
|---|---|
| QSINF | Computes the coefficients of the sine Fourier transform with only odd wave numbers. |
| QSINB | Computes a sequence from its sine Fourier coefficients with only odd wave numbers. |
| QSINI | Computes parameters needed by QSINF and QSINB. |
| QCOSF | Computes the coefficients of the cosine Fourier transform with only odd wave numbers. |
| QCOSB | Computes a sequence from its cosine Fourier coefficients with only odd wave numbers. |
| QCOSI | Computes parameters needed by QCOSF and QCOSB. |
TWO AND THREE DIMENSIONAL COMPLEX FFTS
| ROUTINE | DESCRIPTION |
|---|---|
| FFT2D | Computes Fourier coefficients of a complex periodic two-dimensional array. |
| FFT2B | Computes the inverse Fourier transform of a complex periodic two dimensional array. |
| FFT3F | Computes Fourier coefficients of a complex periodic three-dimensional array. |
| FFT3B | Computes the inverse Fourier transform of a complex periodic three-dimensional array. |
CONVOLUTIONS AND CORRELATIONS
| ROUTINE | DESCRIPTION |
|---|---|
| RCONV | Computes the convolution of two real vectors. |
| CCONV | Computes the convolution of two complex vectors. |
| RCORL | Computes the correlation of two real vectors. |
| CCORL | Computes the correlation of two complex vectors. |
LAPLACE TRANSFORM
| ROUTINE | DESCRIPTION |
|---|---|
| INLAP | Computes the inverse Laplace transform of a complex function. |
| SINLP | Computes the inverse Laplace transform of a complex function. |