How to obtain a plot of some complex function with imaginary and real interval

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Ertugrul Gazi Cam 2020-11-16

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关闭： MATLAB Answer Bot 2021-8-20

Hello guys,im new on matlab and i need your help.any comment would be appreciated.

thats the my question:

i have a laplace function which is 𝐺(𝑠) = (s-1)/ (s^3+4s^2+7s+6)

s: circle in s-plane with center at −1.5 + 0.75𝑖 and radius 2

how can i calculate the outputs of this function and plot them wrt given input above?

regards.

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KSSV 2020-11-16

Read about imag, real.

Ertugrul Gazi Cam 2020-11-16

how ? could you please be more precise

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Answer 1

Setsuna Yuuki. 2020-11-16

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https://ww2.mathworks.cn/matlabcentral/answers/649463-how-to-obtain-a-plot-of-some-complex-function-with-imaginary-and-real-interval#answer_545953

编辑：Setsuna Yuuki. 2020-11-16

在 MATLAB Online 中打开

You can separate in real and imaginary components.

A example :

var = -1.5+0.75i;
realCom = real(var); %only real part
imagCom = imag(var); %only complex part

you can use these numbers as (x, y) coordinates

more info:https://es.mathworks.com/help/matlab/ref/imag.html

more info: https://es.mathworks.com/help/matlab/ref/real.html

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Ertugrul Gazi Cam 2020-11-16

thanks your answer .what would you write as code if you want to plot the outputs in s plane wrt given function in this input domain ? i want to see them and so that understand it basically

How to obtain a plot of some complex function with imaginary and real interval

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