Contourf plot Yscale log2 vs log10
4 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Anas Khan
le 14 Juil 2022
Commenté : Star Strider
le 14 Juil 2022
I have frequencies ranging from 2-194 in a base-2 logarithmic spacing (10 voices per octave) like this:
frex = 2.^([10:76]/10);
I want to plot a spectrogram with contourf using them and make the yaxis logarithmically scaled. I know that the below command does this for base-10 log, but how can I do it for base-2 log? I saw some other questions asking similar, but I don't think the answers actually changed the scale of the y-axis. One person said that log10 and log2 scale shape will be the same. Is that correct?
set(gca,'YScale','log')
0 commentaires
Réponse acceptée
Star Strider
le 14 Juil 2022
You can change the base of the logarithm by dividing it by the desired base, then use the appropriate code to change the tick labels:
frex = 2.^((10:76)/10)
frex2 = log(frex)/log(2)
N = 1024;
n = 0:N-1;
w0 = 2*pi/5;
x = sin(w0*n)+10*sin(2*w0*n);
% Compute the short-time Fourier transform using the function defaults. Plot the spectrogram.
figure
spectrogram(x,'yaxis');
figure
spectrogram(x,'yaxis')
Ax = gca;
yt = Ax.YTick;
Ax.YTickLabel = log(yt)/log(2);
This example is from the spectrogram documentation, with my changes to the y-axis labels.
.
6 commentaires
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Data Distribution Plots dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!