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How to smooth a periodogram with Pwelch.m?

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Kyana Shayan
Kyana Shayan 2017-3-18
编辑： Kyana Shayan 2017-3-18
Hello everyone,
I am trying to smooth a periodogram obtained by FFT.m with Pwelch.m . I studied the materials on Matlab Help, but I don't know where to start and how to do it?
Here is the code for FFT:
loglog(omega,Pu(1:round(N/2)-1));
this gives the periodogram from FFT. Now I am trying to use pwelch on Pu.Is there anyone who can help me?
Regards,

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