This way the yaxis is in linear scale.
Question
How can I change dspdata spectrum units, its in dB (dB/Hz for PSD), I would like the spectrum in real units.
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Expert Answer
Neeta Dsouza
PhD Expert
Answered Nov 20, 2025
The data itself is saved in linear scale, not dB scale. It is only the plotting that displays the value in dB scale. You can try the following:
h = psd(spectrum.periodogram,randn(1024,1)); plot(h.Frequencies,h.Data);
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