how to plot periodic function

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iz
iz 2018-5-14
回答： Ameer Hamza 2018-5-14
I have difficult with plotting a periodic function.
the function is : x(t)= exp(-abs(t)) ,-8<=t<=8 ,0 else
T=50 , (f(8)=f(58))
I succeed to plot the function exp(-abs(t)). But i don't know how to make the range -8<=t<=8 and else 0, and how to make the function periodic.
Thanks for help.

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回答（1 个）

Ameer Hamza
Ameer Hamza 2018-5-14
Try something like this
t = -25:0.1:25;
index = t<8 & t>-8;
y = exp(-abs(t));
T = 50;
t_ = [t-2*T t-T t t+T t+2*T];
y_ = [y y y y y];
plot(t_, y_)

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