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FEIO__Zao

Beginner

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02-19-2019
06:27 PM

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some worry about FFT's half result

Hi,Intel masters,

I am writing to ask for information about the FFT's half result . In matlab,i use fft to compute an real array ,and then use ifft ,i'll get the initial array.However , in MKL, i just coule get a N/2 + 1 result. Could I had some configs to got the full result? If not ,maybe i could to Conj the first half of the result to fill the second result and reverse that ,because of the fft oufput in matlab , that is mirroring .

I would be grateful to receive a prompt reply and I am sorry for my broken English.

thanks,xD.

3 Replies

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FEIO__Zao

Beginner

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02-19-2019
06:37 PM

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My versions is 2017.1.143.Thanks

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you may look at the fft examples ( mklroot/examples/dft[c,f]. there you may find out some examples show how to take such results.

Gennady_F_Intel

Moderator

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02-20-2019
07:59 PM

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FEIO__Zao

Beginner

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02-20-2019
10:58 PM

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dear man .thx a lot.I'll learn it by heart.

For more complete information about compiler optimizations, see our Optimization Notice.