📄 odefun5.m
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function dy = ODEfun5(t,y)
% dy -> dy(1), and dy(2), is output
% y and t is input ,
% y -> y(1), y(2)
% is vector to form the system of eqution
% y(1) is x, dy(1) is dx/dt, and y(2) , is y ; dy(2) is dy/dt
mu = 0.1;
dy =zeros(2,1);% initialize
dy(1) = y(2) - mu * ( y(1) ^ 3 / 3 - y(1) );
dy(2) = - y(1) ;
return
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