How do I change the index of the functions fft,ifft ?

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Akane Aoki
Akane Aoki 2020-12-9
回答： Walter Roberson 2020-12-9
fft and ifft are defined in this way ↓↓
I want to convet j=1~j=n into j=2~j=n+1.
what should i do?

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回答（1 个）

Walter Roberson
Walter Roberson 2020-12-9
Y = fft(YourVector(2:n+1))
X = [YourVector(1), ifft(Y)]

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