MATLAB: Fft with frequency axis on log scale

Question

Hello, I have a sampled signal and I'd like to take it's fft with the x axis on log scale. Also, is there anything wrong with the way I'm doing the fft? Thanks

Here's my code

fs=2000;

Hs=spectrum.periodogram; % Use default values

plot(psd(Hs,Signal,'Fs',fs))

Answer 1

Hi, You can just save the output of psd() and use semilogx

fs=2000; 
Hs=spectrum.periodogram; % Use default values 
psdest = psd(Hs,Signal,'Fs',fs);
semilogx(psdest.Frequencies,10*log10(psdest.Data));
grid on;