急求助：最小二乘参数拟合遇到的问题
最小二乘参数拟合遇到的问题用lsqlin命令进行参数拟合时总是给出如下提示，该怎么改进呢，请高人指点
Optimization terminated: relative function value changing by less
than sqrt(OPTIONS.TolFun), and rate of progress is slow.
resnorm =
1.0465e+004
exitflag =
3
output =
iterations: 25
algorithm: 'large-scale: trust-region reflective Newton'
firstorderopt: 288.1820
cgiterations: 409
message: [1x123 char]
