warning about optimset and using optimoptions

Question

Snoopy 2017-11-20

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/368110-warning-about-optimset-and-using-optimoptions

回答： Xuan Li 2018-3-23

Hi, I use the fminunc function and the optimset as

options = optimset('GradObj','on','MaxFunEvals',1000,'MaxIter',1000,'Display','iter','TolFun',1e-100,'TolX',1e-100,'Algorithm','quasi-newton');
[B_hat_so,fval,exitflag,output,GradObj,hessian] = fminunc(@(B_true)exerciseeightpartonefunction(y,X,Z,B_true,W_hat,N_obs,N_par_X),B_ig,options);

I receive the following warning

Warning: Your current settings will run a different algorithm ('quasi-newton') in a future release. Either use optimoptions to set options (recommended), or set option Algorithm to 'trust-region' using optimset. 
> In throwFminuncGradObjandLargeScaleWarning (line 18) In fminunc (line 170)

What is it that I can do to get rid of this warning? How should I change my code above? Thanks.