How to plot digital sequence in MATLAB

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Tommy P
Tommy P 2022-5-24
评论： Walter Roberson 2022-5-25
I have to plot following digital sequence in MATLAB: a^n * u[n]. a is just a constant. How do I do this?
Thanks

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采纳的回答

David Hill
David Hill 2022-5-24
n=1:length(u);
a=1.7;
plot(n,a.^n.*u);%assuming u is a vector
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Allen
Allen 2022-5-24
You can also plot this using a bar plot vs. a line plot.
bar(n,a.^n.*u)
Walter Roberson
Walter Roberson 2022-5-25
stem()
Note: u[n] is not a vector as such: it indicates the unit step function.

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更多回答（1 个）

Walter Roberson
Walter Roberson 2022-5-24
If you are certain that all of your values are finite, then you can replace u[n] by (n>=0)
If you have negative infinite values then it is not obvious that multiplying by the unit step function is well defined.

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