How to plot graphs with the specific time domain

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Jinquan Li 2021-4-7

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/795432-how-to-plot-graphs-with-the-specific-time-domain

评论： Star Strider 2021-4-8

Hi, i am trying to plot 3 graphs with the specific time domian. Here's my code:

t = -2*pi:0.01:2*pi;
function y = f(t)
y = (abs(t)./t+1)/2 - 2*((abs(t-pi)./(t-pi)+1)/2) + (abs(t-2*pi)./(t-2*pi)+1)/2;
endfunction
plot(t = 0:2*pi,f(t))
title("f(t)");
plot(t = -2*pi:0,-f(-t))
title("-f(-t)");
plot(t = 0:2*pi,-f(t+pi))
title("-f(t+T)");

Here's the error i got:

Below are the results that I would like to obtain. Please help. Thanks!

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回答（1 个）

Star Strider 2021-4-7

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/795432-how-to-plot-graphs-with-the-specific-time-domain#answer_669557

在 MATLAB Online 中打开

I am not certain what you want to do.

Try this:

figure
subplot(3,1,1)
plot(t((t>=0) & (t<= 2*pi)),f(t((t>=0) & (t<= 2*pi))))
ylim([-1  1])
title("f(t)");
subplot(3,1,2)
plot(t((t>=-2*pi) & (t<=0)),-f(-t((t>=-2*pi) & (t<=0))))
ylim([-1  1])
title("-f(-t)");
subplot(3,1,3)
plot(t((t>=0) & (t<= 2*pi)),-f(t((t>=0) & (t<= 2*pi))+pi))
ylim([-1  1])
title("-f(t+T)");
hold off