python - Scipy Leastsq 可选输出变量(Mesg)

Question

SciPy 关于 LeastSq 的文档是 here .它指出 ier 是

An integer flag. If it is equal to 1, 2, 3 or 4, the solution was found. Otherwise, the solution was not found. In either case, the optional output variable ‘mesg’ gives more information.

但是我如何检索可选变量 mesg？

x,ier=leastsq(residuals, plsq, args=(x_vals, y_vals)) 只给我两个返回而

x,mesg,ier=leastsq(residuals, plsq, args=(x_vals, y_vals)) 给出错误消息 ValueError: need more than 2 values to unpack在那条线上。

Answer 1

使用 full_output参数:

import scipy.optimize as optimize
p,cov,infodict,mesg,ier = optimize.leastsq(
    residuals,p_guess,args=(x,y),full_output=True)