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Getting Frequencies Corresponding to Peaks In FFT Plot - MATLAB

Getting Frequencies Corresponding to Peaks In FFT Plot - MATLAB
  1. How do you find frequency in fft plot?
  2. How do you find the frequency of fft in MATLAB?
  3. How do you get to peaks in fft?

How do you find frequency in fft plot?

Let X = fft(x) . Both x and X have length N . Suppose X has two peaks at n0 and N-n0 . Then the sinusoid frequency is f0 = fs*n0/N Hertz.

How do you find the frequency of fft in MATLAB?

Y = fft(y,NFFT)/Datapoints; fs=Datapoints/Length; f = fs/2*linspace(0,1,NFFT/2+1);

How do you get to peaks in fft?

Look for points where the value for the difference function goes from positive to negative. Those are your peak points. To find the most prominent peaks, compute the second order difference function at the points obtained from the first order difference and select the ones which are of highest magnitude.

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