I'm trying to solve a system of non-linear equations. I was successful in solving 5 equations/5unkowns with the function fsolve. However, when I have more than 5, I get the error message: ??? Attempted to access r(17); index out of bounds because numel(r)=5. How do I increase that size so that I can solve for 20 equations, instead of a mazimum of 5?