www.gusucode.com > Matlab在化学工程中的应用 > Matlab在化学工程中的应用/实用化工计算机模拟－Matlab在化学工程中的应用/Examples/Chapter 3/xFsolve.m

    function xFsolve
% xFsolve.m
% 求解非线性方程组示例
% This program is used to demonstrate how to use function fsolve() 
% to solve a set of nonlinear equations
%
%   Author: HUANG Huajiang
%   Copyright 2002 UNILAB Research Center, 
%   East China University of Science and Technology, Shanghai, PRC
%   $Revision: 1.0 $  $Date: 2002/05/07 $

clear all
clc

x0 = [1 1]';
x1 = fsolve(@NonlinEqs,x0)
x0 = [-0.1 2]';
x2 = fsolve(@NonlinEqs,x0)

% ------------------------------------------------------------------
function f = NonlinEqs(x)
f(1) = x(1)-4*x(1)*x(1)-x(1)*x(2);
f(2) = 2*x(2)-x(2)*x(2)+3*x(1)*x(2);