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Signal Processing

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  • $\begingroup$ I get confused by your use of the semicolon. ;. Especially the double ;;. $\endgroup$ Commented Jun 6, 2023 at 18:21
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    $\begingroup$ @robertbristow-johnson That was in the original code. I didn't notice! Matlab just ignores it, in effect. $\endgroup$ Commented Jun 6, 2023 at 18:41
  • $\begingroup$ But if I make the change as you suggested, then amplitudes won't align. Is this just a matter of shifting the x axis around? It causes no end in confusion the way that MATLAB requires the fftshift(fft(x))... $\endgroup$ Commented Jun 6, 2023 at 20:39
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    $\begingroup$ @Darcy Go back to basics: go to the matlab site I linked to and see how they've defined it. Matlab doesn't require anything of the sort (fftshift). You may want to use if for display of centered data. I rarely do. I just plot the positive frequencies if it's an issue. $\endgroup$ Commented Jun 6, 2023 at 20:54
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    $\begingroup$ You seem to have forgotten to mention fftshift(fft(x)) -> fft(x). Your edit makes it a standard FFT. $\endgroup$ Commented Jun 7, 2023 at 4:38