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Math Forum » Discussions » Software » comp.soft-sys.matlab

Topic: query about function output
Replies: 4   Last Post: Dec 26, 2013 7:45 AM

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Dhanashree

Posts: 3
Registered: 12/24/13
query about function output
Posted: Dec 24, 2013 1:58 AM
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y=abs(x_fft(1:M/2,:));
imagesc(t,f,dB(y))

imagesc gives me the spectrogram.that is i have used that function to plot the spectrogram.y is giving the magnitude of the fft calculated.In the above function what does dB(y) do? when i use only y i get complete ble coloured spectrogram.plz help.



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