How to change TolFun?

Question

Bestun 2012-3-25

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https://ww2.mathworks.cn/matlabcentral/answers/33427-how-to-change-tolfun

采纳的回答： Geoff

Dear All, Could one help me how to change TolFun ??

I look forward to hearing from you Regards Bestun

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Answer 1

Geoff 2012-3-25

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https://ww2.mathworks.cn/matlabcentral/answers/33427-how-to-change-tolfun#answer_42003

在 MATLAB Online 中打开

You haven't said which solver you are using. Let's assume fzero:

opts = optimset('fzero');
opts = optimset( opts, 'TolFun', 1e-3 );

Then pass the options to your solver.

X = fzero( FUN, X0, opts );

This is all straight out of the documentation for optimset, by the way. =) Now that you know where to look, it's worth a read.

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Answer 2

Bestun 2012-3-25

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many thanks Dear Geoff for your lovely answer regarding to my second question . I attached the code .Could you please see it The message error is Exiting: One or more of the residuals, duality gap, or total relative error has grown 100000 times greater than its minimum value so far: the primal appears to be infeasible (and the dual unbounded). (The dual residual < TolFun=1.00e-008.)