http://www.fftw.org/
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).
FFTW
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battleshooter
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Lobster
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Fourier transform (DFT) in one or more dimensions
Any dimensions I need to transform?
http://tmxxine.com/w/FaqsTmxxine
apologies for the interlude
