How to plot digital sequence in MATLAB
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I have to plot following digital sequence in MATLAB: a^n * u[n]. a is just a constant. How do I do this?
Thanks
采纳的回答
David Hill
2022-5-24
n=1:length(u);
a=1.7;
plot(n,a.^n.*u);%assuming u is a vector
3 个评论
Tommy P
2022-5-24
Is it possible to show this as a discrete spectrum? instead of a line, more someting like this as lay-out?
Allen
2022-5-24
You can also plot this using a bar plot vs. a line plot.
bar(n,a.^n.*u)
Walter Roberson
2022-5-25
stem()
Note: u[n] is not a vector as such: it indicates the unit step function.
更多回答（1 个）
Walter Roberson
2022-5-24
0 个投票
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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