how to get rid of error which says too many output arguments

hi,

i want to solve the equation d^2x/dt^2= f(-2*x3 + x2) which is for 3 harmonic oscillators.In my editor i wrote the following;

function test3(t,x)

xdot(1)=x(2);

xdot(2)= 10*(-2*x3 + x2);

xdot=xdot';

end

and then i executed the command:

[t,x]=ode45('test3', [0 5], [2 3]);

and the error i get is " too many output arguments" which i don't know how to omit. How can i get rid of this error? Kindly if someone could help me figure it out i would be grateful. Thanks

Answer 1

[Star Strider]

The ‘test3’ function needs to be:

function xdot = test3(t,x)
xdot(1)=x(2);
xdot(2)= 10*(-2*x3 + x2);
xdot=xdot';
end

and the ode45 call needs to be:

[t,x]=ode45(@test3, [0 5], [2 3]);

That should work.