Question
I want to plot the following signal in matlab but I am not sure how to do this with the unit step response involved. x[n] = ((4/5)^n)u[n] -5 < n < 20
Expert Answer
John Williams
PhD Expert
Answered Aug 24, 2026
You can use heaviside function:
n = -5:1:20; x = ((4/5).^n).*heaviside(n); stem(n,x)
Bet be aware heaviside(0)=0.5
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