MATLAB: Function used in fsolve with array coefficients

Question

Do you have access to the Symbolic Toolbox?

Answer 1

You should be passing ai to MyFun. The size of the ai array can be determined inside MyFun, and from that the number of coefficients.

Xi=fsolve(@(x)MyFun(x,ai),X0)  ;
function out=MyFun(x,ai)
     [m,n]=size(ai);
     out=...
  end