FFTW is a C subroutine library for computing the discrete Fourier transform (DFT) in one or more dimensions, of arbitrary input size, and of both real and complex data (as well as of even/odd data, i.e. the discrete cosine/sine transforms or DCT/DST).

Mar 3, 2010 · FFTW is designed to be called directly from C and C++, of course, and also includes wrapper functions allowing you to call it from Fortran. Several of our users have contributed code to make it easier to call FFTW from other languages as well: C# and .NET wrappers from the ILNumerics project .NET wrappers by Tobias Meyer.

Mar 3, 2010 · Welcome to FFTW, the Fastest Fourier Transform in the West. FFTW is a collection of fast C routines to compute the discrete Fourier transform. This manual documents FFTW version 3.3.10.

This manual documents version 3.3.10 of FFTW, the Fastest Fourier Transform in the West. FFTW is a comprehensive collection of fast C routines for computing the discrete Fourier transform (DFT) and various special cases thereof.

This chapter describes the basic usage of FFTW, i.e., how to compute the Fourier transform of a single array. This chapter tells the truth, but not the whole truth. Specifically, FFTW implements additional routines and flags that are not documented here, although in many cases we try to indicate where added capabilities exist.

This chapter describes the basic usage of FFTW, i.e., how to compute the Fourier transform of a single array. This chapter tells the truth, but not the whole truth. Specifically, FFTW implements additional routines and flags, providing extra functionality, that are not documented here. See Section FFTW Reference, for more complete information ...

This manual documents version 3.3.10 of FFTW, the Fastest Fourier Transform in the West. FFTW is a comprehensive collection of fast C routines for computing the discrete Fourier transform (DFT) and various special cases thereof. FFTW computes the DFT of complex data, real data, even- or odd-symmetric real data

This is the list of Frequently Asked Questions about FFTW, a collection of fast C routines for computing the Discrete Fourier Transform in one or more dimensions. Index Section 1.

FFTW implements a mechanism called "wisdom" for saving plans to disk (see the manual). FFTW 3.3 includes fftw_export_wisdom_to_filename and fftw_import_wisdom_from_filename functions where you supply a filename to write/read to/from, respectively. We believe that these should work fine from Windows DLLs.

It is quite straightforward to install FFTW even on non-Unix systems lacking the niceties of the configure script. The FFTW Home Page may include some FFTW packages preconfigured for particular systems/compilers, and also contains installation notes sent in by users.