How to Integrate the equation with function handler?

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gourav pandey 2021-4-15

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https://ww2.mathworks.cn/matlabcentral/answers/802781-how-to-integrate-the-equation-with-function-handler

评论： Ioannis Matthaiou 2021-4-15

%% Thank you in advance!!

clc;

clear;

close all;

syms omega1

n=2;

a1=1;

x=2;

y=2;

G_2=5;

Q_2=0;

A_hs =-G_2/omega1^2;

B_hs =(-G_2*abs(omega1) - Q_2*1i*omega1)/omega1^2;

Phi=(A_hs+B_hs.*x).*exp(-abs(omega1).*x);

f=@(omega1) A_hs.*(exp(-x*abs(omega1))).*exp(-1i.*omega1.*y);

sigma_xx=(integral(f,-2,2))

### showing Some error in calculation

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回答（1 个）

Ioannis Matthaiou 2021-4-15

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/802781-how-to-integrate-the-equation-with-function-handler#answer_675741

The command can be as follows:

sigma_xx=ode45(@(t,omega1) f(t,omega1,x,y), tspan, ICs, options)

The function to integrate as follows:

function sigma_x = f(t,omega1,x,y)

sigma_x = A_hs.*(exp(-x*abs(omega1))).*exp(-1i.*omega1.*y);

end

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gourav pandey 2021-4-15

one more doubt i have. why we have 't' in the code?

Ioannis Matthaiou 2021-4-15

Hello,

Please read the following official documentation: https://uk.mathworks.com/help/matlab/ref/ode45.html

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