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how to find the frequency of a plotted signal in matlab

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Ahmad Mheadat

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If you had a signal that has been filtered and known to be a sinusoid, this signal has this value <30001x1 double> how could you find its frequency ?
 

Take the fft of the signal ( squence that you) have....plot amplitude specturm of with command plot(abs( fft(x)))....the peaks will tell you the frequecy that is most fundamental to your sequence.....

good luck
 

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