fsolve solver formulation?

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tonton
tonton 2016-4-27
编辑： tonton 2016-5-3
Is the problem well formulated to solve "nmax" equations with "nmax" unknowns with fsolve?
The equation is the following,
pot(1:nmax) = q./epsx(1:nmax) .* ( -get_n(x(1:nmax)) + Ndx(1:nmax) + get_p(x(1:nmax)) - Nax(1:nmax) ) + val_dxx_vv(1:nmax);
"x" is the initial guess array (1:nmax),
"get_n" and "get_p" are non-linear functions of "x", and the rest are all arrays. As you see this is the same equation, but I need to get a solution for every single "x".
Is this formulation ok with matlab, because the code keeps running indefinitely without returning anything. I also used a "drawnow" instruction to follow "x" as
figure(10)
hold on
plot(position,x)
drawnow
but the same "x" will be returned again and again.

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