How can I make condition on the outputs of ODE45????

Dear friends;

I have to solve the initial value problem for a system of first order differential equations. I have created an M-file called funsys

function ydot=funsys(t,y) ydot=zeros(3,1); ydot(1)=2*y(1)+y(2)+5*y(3)+exp(-2*t); ydot(2)=-3*y(1)-2*y(2)-8*y(3)+2*exp(-2*t)-cos(3*t); ydot(3)=3*y(1)+3*y(2)+2*y(3)+cos(3*t); end

and I have typed the following command in an m file as follows

y0=[1 -1 0]; [t,y]=ode45(@funsys,[0 pi/2],y0);

this program works, but I need how to include a constraint in this program. This constraint is as follows

max(Y)=[a b c] min(Y)=[d e f] with a, b, c, d, e and f are known numbers. So, How can I make conditions on the outputs of ODE45 ?????

I need your help Thanks

[Torsten]

What do you mean by "make conditions on the outputs of ODE45" ?

The solution of your ODE system is uniquely determined by the three equations you use ...

Best wishes

Torsten.