warning about optimset and using optimoptions

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.

Answer 1

[Star Strider]

Your best option is in the error message:

set option Algorithm to 'trust-region' using optimset.

Answer 2

[Xuan Li]

need to 'cd' to directory that you save costFunction()