How to plot signal with unit step?

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Bilal Siddiqui
Bilal Siddiqui 2015-9-15
回答： Divine 2023-11-3
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

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采纳的回答

Hamoon
Hamoon 2015-9-15
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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Hamoon
Hamoon 2015-9-15
you can also use this if you want to have u[0]=0:
n = -5:1:20;
myStep = @(n) (n>0);
x = ((4/5).^n).*myStep(n);
stem(n,x)

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更多回答（2 个）

Kamalika Saha
Kamalika Saha 2022-1-5
n = -5:1:20;
x = ((4/5).^n).*heaviside(n);
stem(n,x)
Divine
Divine 2023-11-3
n = -5:1:20;
x = ((4/5).^n).*heaviside(n);
stem(n,x)

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