I have time signal x obtained from an experiment in MATLAB workspace. I need the signal plot in frequency domain using FFT for finding the amplitude of fundamental, second and third harmonics. I need MATLAB code.

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Elango Paulchamy
Elango Paulchamy 2016-5-16
回答： Star Strider 2016-5-16
I have time signal x obtained from an experiment in MATLAB workspace. I need the signal plot in frequency domain using FFT for finding the amplitude of fundamental, second and third harmonics. I need MATLAB code.

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Star Strider
Star Strider 2016-5-16
All the code you need is between to first two plot images in the R2015a documentation for fft.

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