fft
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| − | {{DavinciWiki_Function | + | {{DavinciWiki_Function| |
| − | [[ | + | Perform a fast Fourier transform on an object containing an arbitrary number of samples. |
| + | | | ||
| + | Arguments: A numeric array | ||
| + | |||
| + | Return Value: A 2xN array containing the real and imaginary components | ||
| + | | | ||
| + | [[Syntax]]: fft(real = VAL, img = VAL) | ||
| + | | | ||
| + | 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] | ||
| + | | | ||
| + | [[Image:fft1.png|500px]] [[Image:fft2.png|500px]] [[Image:fft3.png|500px]] | ||
| + | | | ||
| + | | | ||
| + | *[[ifft]] | ||
| + | | | ||
| + | | | ||
| + | }} | ||
[[category:Functions]] | [[category:Functions]] | ||
| + | [[category:Davinci Core]] | ||
[[category:Math]] | [[category:Math]] | ||
Latest revision as of 12:28, 6 April 2006
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Contents: Description, Arguments, Usage, Examples, Images, Related Functions Supported Under Version: >1.69 Current Davinci Version: 2.27 64-bit Safe: No
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
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Recent Core Changes Modified On: 04-06-2006 |
