how to get my plot to only go to the value of 'n' I have set

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Anthony Walden
Anthony Walden 2022-6-18
评论： Star Strider 2022-6-18
The below code plots out to well past the values of 'n' and I was wanting to limit it to just the range of 'n'. I saw something about using size(n) but I am not sure how and where to place it so that my plot only goes from 0 to 20 along the 'n' axis. Any help would be appreciated.
syms t;
n = 0:20;
N = 21;
% piecewise of x1 and x2 for unit pulse
x_n = [1, zeros(1,20)];
% discrete time unit pulse response
h_n = 0.05.^n - 0.25.^n;
% Convolution of unit step input x[n] and unit-pulse response h[n]
Y = conv(x_n,h_n);
figure(1);
stem(Y);

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回答（1 个）

Star Strider
Star Strider 2022-6-18
Ran in:
The easiest way is to just use xlim —
syms t;
n = 0:20;
N = 21;
% piecewise of x1 and x2 for unit pulse
x_n = [1, zeros(1,20)];
% discrete time unit pulse response
h_n = 0.05.^n - 0.25.^n;
% Convolution of unit step input x[n] and unit-pulse response h[n]
Y = conv(x_n,h_n);
figure(1);
stem(Y);
xlim([min(n) max(n)])
.

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