How to get the Z-Axis of power spectrogram?

I want to get the Z-axis of spectrogram stored in a matrix. I can see the X,Y and Z values, whenever I put the cursor anywhere on the spectrogram. But How can I get the Z values for the whole spectrogram in a matrix?

Answer 1

[Star Strider]

To see it in 3D, use the view function and choose an appropriate azimuth and elevation. (It was a surf plot in earlier releases, so this would be straightforward. It now requires outputs and a separate surf call.)

An example from the documentation —

fs = 1000;
t = 0:1/fs:2-1/fs;
y = chirp(t,100,1,200,'quadratic');

figure
spectrogram(y,100,80,100,fs,'yaxis')
colormap(turbo)

[sx,fx,tx] = spectrogram(y,100,80,100,fs,'yaxis');                      % Call 'spectrogram' With Outputs

Ax = gca;
xlbl = Ax.XLabel.String;
ylbl = Ax.YLabel.String;

hcb = findobj(gcf, 'Type','colorbar');
cbstr = hcb.Label.String;

figure
surf(tx,fx,mag2db(abs(sx)), 'EdgeColor','none')                         % Plot Wioth 'surf'
colormap(turbo)
hcb2 = colorbar;
hcb2.Label.String = cbstr;
view(-30,60)                                                            % Set Camera Azimuth & Elevation
xlabel(xlbl)
ylabel(ylbl)

.

[Sania Gul]

Thnks s lot 😊

[Star Strider]

As always, my pleasure!