ODE45 Code Issue

Any help would be greatly appreciated on this code! The error messages are located beneath the code.

[T,X] = ode45(@(t,x) ode45for3B(t,x), [0,10], [0,0]);

function [xdot] = ode45for3B(t,x)
    xdot = [0;0;0;0];
    xdot(1) = x(2);
    xdot(2) = (-5.667).*x(1) - (1.333333).*x(2) + (3.667).*x(3) + (1.333333).*x(4);
    xdot(3) = x(4);
    xdot(4) = (2.5).*x(1) + (0.9091).*x(2) - (2.5).*x(3) - (0.9091).*x(4) + (4.5454);
end


Index exceeds the number of array elements (2).

Error in ME357_HW6_3B>ode45for3B (line 15)
    xdot(2) = (-5.667).*x(1) - (1.333333).*x(2) + (3.667).*x(3) + (1.333333).*x(4);

Error in ME357_HW6_3B>@(t,x)ode45for3B(t,x) (line 10)
[T,X] = ode45(@(t,x) ode45for3B(t,x), [0,10], [0,0]);

Error in odearguments (line 90)
f0 = feval(ode,t0,y0,args{:});   % ODE15I sets args{1} to yp0.

Error in ode45 (line 115)
  odearguments(FcnHandlesUsed, solver_name, ode, tspan, y0, options, varargin);

Error in ME357_HW6_3B (line 10)
[T,X] = ode45(@(t,x) ode45for3B(t,x), [0,10], [0,0]);

Answer 1

[Star Strider]

Four differential equations require four initial conditions.

[T,X] = ode45(@(t,x) ode45for3B(t,x), [0,10], [0,0]);
                                                ↑ ← HERE

there are only two.

[Ryan Bingaman]

Can't believe it was something that simple that I missed. Thank you!!

[Star Strider]

My pleasure!

If my Answer helped you solve your problem, please Accept it!