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Recent content by roujhan

  1. R

    FFT matlab: wrong 0Hz frequency

    Hi, Thanks for your answers But I subtract the mean value.
  2. R

    FFT matlab: wrong 0Hz frequency

    Hello I want to use fft in MATLAB to analize some exprimental data saved as an excell file attached here as a doc file. my code: A=xlsread('Book.xls'); G=A'; x=G(2, : ); N=length(x); F=[-N/2:N/2-1]/N; X = abs(fft(x-mean(x),N)) X = fftshift(X); plot(F,X) But it plots a graph...

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