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Matlab-Plot Power Spectrum of time series
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Aug18-10, 09:43 AM
and thank you for reading/responding to my thread.I have a problem which involves time series and its power spectra.
I have an 10.000xN matrix(called matr) whose columns are individual time series with real data values and I want to plot their power spectra against frequency.These time series where generated by an iterative map which involved a sin function with omega=0.1. Plotting freq versus power I might be able to see if any harmonics are present.
Below are the steps I take in Matlab:
y=fft(matr) % get the fourier transform of the matrix
y=(abs(y)).^2 %this is the power spectra
Is the above right?
Also I'm puzzled as to what frequency range I should use.
Thank you all
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