Solving state space equation using ODE45

Hello, I'm new to this. I have just about the most minimal skill possible when it comes to writing code or programs, so please bear with me. I am trying to numerically integrate a mechanical system with MATLAB, and I am getting errors saying my dimensions must agree. I have done this twice before with a program my professor wrote, but all of my examples were 2x2 matricies. The problem I am dealing with now is a 6x6. I have a picture of my matrix and code attached. How would I write this in a way that MATLAB can understand? Thanks

Answer 1

[Torsten]

x0 should be a column vector, not a row vector.

Best wishes

Torsten.