Subplot a mosaic of spectrogram

Hello,

I woud like to plot many spectrograms (as the attached one) on a single figure by using a for loop. I was using the following code but it doesn't work:

NumbofSignals=4
for k=1:NumbofSignals
    h(k) = figure ;
    wcoherence(Y{1},Y{k}, 1000)
    f2 = figure;
    subplot(2,NumbofSignals,k);
    h(k);
end

Do you have any idea on how to do this?

Thank you in advance for your answer!

[Adam Danz]

Every time you call figure() a new figure is generated, unless you're calling a specific existing figure. I don't know what your code is supposed to be doing but if you want the loop to act on the same figure, this is how it should be structured,

NumbofSignals=4
figure
hold on
for k=1:NumbofSignals
    wcoherence(Y{1},Y{k}, 1000)
end