概述
% matlab script to demonstrate Newton iteration in higher dimensions % the system of nonlinear equations to be solved is defined in function f % the Jacobian of f is defined in function Jf xOld = input('Enter initial guess: '); tol = input('Enter error tolerance: '); error = 1; count = 0; while (error > tol), % this is what you want to do ... % xNew = xOld - inv(Jf(xOld))*f(xOld) % this is how you do it ... xNew = xOld - Jf(xOld)f(xOld) count = count + 1 error = norm(xNew-xOld)+4*eps*norm(xNew) xOld = xNew; pause end
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