Hi! I need help from someone that knows something about numerical methods in MATLAB. Specifically, fsolve. So, I have an equation L = K(x) - F(x,y). Given the values of L and y, I need to determine the value of x numerically. So, here's what I've done: G(x) = L- K(x) + F(x,y) in the function m-file function [G] = g(x,y,L) I then need to evaluate G(x) numerically to find the values of x at which G(x) becomes 0. Thats my understanding of numerical determination. So I use the fsolve command in Matlab this way [x, fval] = fsolve(@g, x, options); But the problem is that I need to pass multiple values of y, L and some initial estimate of x (that apparently fsolve requires) to find different values of x for different values of y. Matlab doesnt accept this. i.e. ideally I'd like to do something like for y=0:0.1:10 [x, fval] = fsolve(@g(x,y,L), x, options); end where I can pass multiple values of y and L (array or for-loop) to find the values of x. Can I do this? or do I need to declare Global variables and access y and L in function g that way? Also, if I've no idea of what x looks like, how do I estimate an initial value? Would appreciate your contributions to resolving this. Thanks.