How to make the Blue curve smoother ?

Question

Eisa Alyaqoub 2019-10-5

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/483697-how-to-make-the-blue-curve-smoother

评论： Walter Roberson 2019-10-5

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

Could anyone help, please ?

I ant to smooth the blue curve insted being with sharp edges ?

I tried the smooth(), but it did not hep.

clc;
clear all;
close all;
t=0:20;
V_1=1 - ((1.10625)*(exp(-0.438*t))) + ((0.10625)*(exp(-4.56*t)));
V_2=1+((exp(-0.5*t)).*((-0.9)*(cos(1.323*t))-(0.34)*(sin(1.323*t))));
%V1=smooth(V_2);
plot(t,V_1,'r')
hold on
plot (t,V_2,'b')
legend('OverDamped','UnderDamped')

Thank you in advance.

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Answer 1

Walter Roberson 2019-10-5

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/483697-how-to-make-the-blue-curve-smoother#answer_394915

在 MATLAB Online 中打开

t=linspace(0,20,100);

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Eisa Alyaqoub 2019-10-5

Thank you for your help.

It works, but could you please explain ?

Walter Roberson 2019-10-5

You get sharp plots when you sample a curve far apart compared to how rapidly it is changing. You were sampling only at the integers 0, 1, 2, 3, and so on, which is only 4 3/4 points per cyle of your sin() and cos() of 1.323*t

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