how can i plot 5 periods of this signal
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hi, i have the following signal and i want to plot 5 cycles of it. but i'm getting an error
samples = 500;
T = 5;
f0 = 1/T;
t = linspace(0,T,samples+1); % 5 cycles
t(end) = [];
s2_hinf = exp(-((t-6)/4));
s2 = repmat(s2_hinf, [1 5]);
figure(1)
plot(t, s2);
but i'm getting the following error Error using plot Vectors must be the same length.
2 commentaires
Jan
le 25 Mar 2018
Modifié(e) : Jan
le 25 Mar 2018
@OMAR ALQARNI: Please do not remove the relevant part of the question. Thanks.
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Réponse acceptée
Jan
le 24 Mar 2018
Modifié(e) : Jan
le 24 Mar 2018
If you use repmat to concatenate the data 5 times, you have to concatenate the time t also 5 times, but add T in each block cumulatively:
samples = 500;
T = 5;
t = linspace(0,T,samples+1); % 5 cycles
t(end) = [];
s2_hinf = exp((6 - t) / 4);
s2 = repmat(s2_hinf, [1 5]);
t2 = reshape(t(:) + (0:T:4*T), 1, []); % >= Matlab R2016b
figure;
plot(t2, s2);
With older Matlab versions:
t2 = reshape(bsxfun(@plus, t(:), 0:T:4*T), 1, []);
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Plus de réponses (2)
Image Analyst
le 24 Mar 2018
Your linspace() is wrong. You could do this:
samples = 500;
T = 5; % Period
f0 = 1/T; % Not used!
t = linspace(0, 5 * T, samples); % 5 cycles
s2_hinf = exp(-((t-6)/4));
plot(t, s2_hinf);
But I don't see where any cycles comes in. You are not using anything like sin() or cos(), so are you expecting oscillations?
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Image Analyst
le 24 Mar 2018
Perhaps you mean this:
samples = 500;
T = 5; % Period
f0 = 1/T; % Not used!
t = linspace(0, T, samples); % 5 cycles
s2_hinf = exp(-((t-6)/4));
s5 = repmat(s2_hinf, [1, 5]);
t = linspace(0, length(s5), samples*5); % 5 cycles
plot(t, s5);
grid on;
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/180425/image.png)
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