Cleaning out some old files from a grad class. I have one- and
two-dimensional FFT code in C, ported to Java. It's from the
"Numerical Recipes" book so it's limited to 2^n.
It needs unit tests and test cases.
FFT begs the question of generalizing to Discrete Wavelet
transformations (DWT).
If I can find my notes I'll also be able to contribute multigrid
code. This is a fairly efficient algorithm to solve PDQs. I'll
leave it to others to add support for parallel- and
clustered-processing.
Bear
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