function xLsqcurvefit
% 非線性最小二乘曲線擬合
%
%   Author: HUANG Huajiang
%   Copyright 2003 UNILAB Research Center, 
%   East China University of Science and Technology, Shanghai, PRC
%   $Revision: 1.0 $  $Date: 2003/07/04 $

k = [2, 6];
xdata = [2; 5; 7];
ydata = k(1)*exp(xdata) + k(2);
k0 = [5, 5];
k = lsqcurvefit(@ObjFunc, k0, xdata, ydata)

% ------------------------------------------------------------------
function F = ObjFunc(k,xdata)
F = k(1)*exp(xdata) + k(2);