Comparison of the IDL FFT Function
QUESTION: What's up with the IDL FFT function? I don't get the same results as when I use my FORTRAN FFT function.
ANSWER: Paul van Delst at the University of Wisconsin has written up a nice set of notes on how to use the IDL FFT routine correctly. Point your browser to this URL, turn your image downloading on, and be prepared to wait just a couple of minutes while the page downloads. The images are what you want to see, and the explanation is bang on.
Copyright © 1998-2005 David W. Fanning
Last Updated 29 January 2005