MATLAB: How to plot spectrogram without using function “spectrogram”

MATLABplotspectrogram

Hello I've got a signal which depends on three variables. I want to plot a draft like draft using function "spectrogram" (2D draft with three axes, third axis is displayed with color). I don't want to use this function, because before plotting it processing a signal, but I have alredy processed signal. Thank you for your future help.
Best regards, Andrew

Best Answer

To replicate the plotting behavior of spectrogram.m, use surf()
   z = randn(100,100);
   t = 1:100;
   x = 1:100;
   surf(t,x,abs(z),'EdgeColor','none');   
   axis xy; axis tight; colormap(jet); view(0,90);
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