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A Short MATLAB Script for Spectrum Analysis or FFT

The following codes may be used for spectrum analysis for any vibration problems. The program is capable of isolating fundamental peaks from a noisy signal smoothly. It uses the MATLAB built-in Fast Fourier Transform (FFT) algorithm.

Codes for Spectrum Analysis (FFT):

NS=EFFORTS(:,1);                 % Data to Analyze
Fs=L;                            % Sample Rate
NFFT = 2^nextpow2(L);
F = Fs/2*linspace(0,1,NFFT/2+1);
X = fft(Ywin,NFFT)/L;            % MATLAB built-in FFT Algorithm
Xf=Xf/max(Xf);                   % Normalizing Magnitude


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