wavelet, a Fortran90 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 code which implements the Fast Fourier Transform by Swarztrauber and Valent;
haar_transform, a Fortran90 code which computes the Haar transform of data.
sftpack, a Fortran90 code which implements the slow Fourier transform, intended as a teaching tool and comparison with the fast Fourier transform.
sine_transform, a Fortran90 code which demonstrates some simple properties of the discrete sine transform.
walsh_transform, a Fortran90 code which implements versions of the Walsh and Haar transforms.