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Re: Fast Fourier Transforms
Posted:
Sep 13, 1996 6:22 PM
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In article <01bba023$534ee700$010200c0@faris.ecn.purdue.edu>,
"Joseph H. Sullivan" <jsulliva@ecn.purdue.edu> wrote:
>I was wondering if anybody could explain how to transform the Matlab FFT
>response into readable cos and/or sin fourier coefficients. Can it be
>done?
>As an example, say I feed it an array of data representing a combination of
>
>step functions over a period of 2pi that look like a cosine. Can I apply
>the FFT
>to that array and derive the first harmonic coefficient?
The REAL part of the FFT is the "COSINE" transform whereas the
IMAGINARY part corresponds to the "SINE" coefficients.
Hope this helps.
------------------------------------------------------------------------------
Dr. Djamil Boulahbal
Mechanical Engineering - E2
University of Waterloo
Waterloo, Canada
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