fft

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  2x1000x1 array of double, bsq format [16,000 bytes]
 
  2x1000x1 array of double, bsq format [16,000 bytes]
 
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[[Image:fft1.png|500px]] [[Image:fft2.png|500px]] [[Image:fft3.png|500px]]
 
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Latest revision as of 12:28, 6 April 2006



Description

Perform a fast Fourier transform on an object containing an arbitrary number of samples.

Arguments and Return Values

Arguments: A numeric array

Return Value: A 2xN array containing the real and imaginary components

Usage

Syntax: fft(real = VAL, img = VAL)

Examples

dv> a=create(1000,1,1,start=0.0,step=0.0628,format=float)
1000x1x1 array of float, bsq format [4,000 bytes]

dv> b=cos(a)
1000x1x1 array of float, bsq format [4,000 bytes]

dv> f = fft(b)
2x1000x1 array of double, bsq format [16,000 bytes]

Images

fft1.png fft2.png fft3.png

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Modified On: 04-06-2006

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