P5-math-fft

Perl module providing an interface to Fast Fourier Transform routines

The MathFFT module provides an interface to various Fast Fourier Transform FFT routines of the C routine of fft4g.c; The one-dimensional data sets, of size 2^n, are assumed to be sampled at a constant rate.

The FFT methods available are

• cdft Complex Discrete Fourier Transform
• rdft Real Discrete Fourier Transform
• ddct Discrete Cosine Transform
• ddst Discrete Sine Transform
• dfct Cosine Transform of RDFT Real Symmetric DFT
• dfst Sine Transform of RDFT Real Symmetric DFT as well as their inverses.

The C code for the FFT routines of fft4g.c is copyrighted 1996-99 by Takuya OOURA. The file arrays.c included here to handle passing arrays to and from C comes from the PGPLOT module of Karl Glazebrook kgb@aaoepp.aao.gov.au. The perl interface of the MathFTT module is Copyright 2000 by Randy Kobes randy@theoryx5.uwinnipeg.ca, and may be distributed under the same terms as Perl itself.

WWW http//search.cpan.org/dist/Math-FFT/