I can't get the correct plot

2017 8 3
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更新时间：2017 8 4
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Hello all,
I'm having trouble trying to reproduce my instructor plot, but I can't seem to get the right plot. This is what I have right now:
t=linspace(-2,2);
i_p=(-30/13)*cos(60*t)+(45/13)*sin(60*t)+(160/17)*cos(40*t)-(40/17)*sin(40*t);
plot(t,i_p)
grid on
title('LRC Steady-State')
xlabel('Time(t)')
ylabel('Current(i)')
And here is what I have for my plot:
And here is what my instructors plot looks like:
At this moment, I'm lost and can't seem to reproduce the plot. Any help would be great. Thanks in advance.

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Akira Agata
Akira Agata 2017-8-3

0 个投票

This is due to the low sampling speed. Please try to use much higher sampling rate, like:
t=linspace(-2,2,2000);

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