wavelet, a Fortran77 code which contains some utilities for computations involving wavelets.
The information on this web page is distributed under the MIT license.
wavelet is available in a C version and a C++ version and a Fortran90 version and a MATLAB version and an Octave version.
fftpack5, a Fortran90 library which implements the Fast Fourier Transform by Swarztrauber and Valent;
haar_transform, a Fortran77 library which computes the Haar transform of data.
sftpack, a Fortran77 library which implements the slow Fourier transform, intended as a teaching tool and comparison with the fast Fourier transform.
sine_transform, a Fortran77 library which demonstrates some simple properties of the discrete sine transform.
WALSH, a Fortran77 library which implements versions of the Walsh and Haar transforms.