error while using ezplot

Question

Seungwon Lee 2020-4-11

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/517115-error-while-using-ezplot

评论： Ameer Hamza 2020-4-12

ezplot('((5.14*10^(-4))-(6.44*10^(-5)*i))*exp(5*i*t)+exp(-0.796*t)*(0.99+6.44*10^(-5)*i)*cos(7.96*t)+exp(-0.796*t)*(-0.099-3.29*10^(-4)*i)*sin(7.96*t)',[0,20])

nothing appears when i use ezplot i dont know why

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Ameer Hamza 2020-4-11

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/517115-error-while-using-ezplot#answer_425366

编辑：Ameer Hamza 2020-4-11

在 MATLAB Online 中打开

You equation returns numbers with both real and imaginary parts. Following code plots both

f = @(t) ((5.14*10^(-4))-(6.44*10^(-5)*1i)).*exp(5*1i*t)+exp(-0.796*t).*(0.99+6.44*10^(-5)*1i).*cos(7.96*t)+exp(-0.796*t).*(-0.099-3.29*10^(-4)*1i).*sin(7.96*t);
t = linspace(0,20,1000);
f_value = f(t);
subplot(2,1,1);
plot(t, real(f_value))
title('real');
subplot(2,1,2);
plot(t, imag(f_value))
title('imaginary');

2 个评论
显示无隐藏无

Seungwon Lee 2020-4-12

thanks for answering Ameer Hamza. Can you tell me the meaning of @(t) in the fist line?

Ameer Hamza 2020-4-12

This is a way to define an anonymous function. It is used to define simple functions without using a function block. If you have experience with other programming languages, then you can think of its as a lambda function.

请先登录，再进行评论。

Answer 2

Geoff Hayes 2020-4-11

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/517115-error-while-using-ezplot#answer_425365

Seungwon - try using fplot instead which is recommended to be used instead of ezplot. Note that when I run your code with ezplot, nothing shows up for me either....yet it does work with fplot.