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How to write code for a function x(t), consist of two sine wave with instantaneous frequencies at different time spot as seen in figure below:

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Jan Ali
Jan Ali on 27 Oct 2020
Commented: Stephan on 27 Oct 2020
Could any one help me how to write the Matlab code for this function in order to plot the Hilbert spectrum?

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Accepted Answer

Stephan
Stephan on 27 Oct 2020
syms t
y = piecewise((0<t)&(t<=2), sin(2*pi*5*t), (2<t)&(t<=5), sin(2*pi*40*t))
fplot(y)

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