lsqcurvefit不能返回拟合参数的误差么

可以，[X,RESNORM,RESIDUAL,EXITFLAG,OUTPUT]= LSQCURVEFIT(FUN,X0,XDATA,
YDATA,...)
X以后的分别代表
the value of the squared 2-norm of the residual at x
the value of the residual fun(x,xdata)-ydata at the solution x.
a value exitflag that describes the exit condition.
a structure output that contains information about the optimization.
还有一些输出参数，楼主查看HELP才是王道