Relative versus absolute values of TolX and TolFun
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In using solvers such as fminsearch and lsqnonlin the on-line help documentation state that these tolerances are generally absolute tolerances but can be used as relative tolerances. What is not clear to me is: 1. when they are used in each of these ways; 2. whether it is possible to specify how you would like them to be used (i.e., in an absolute versus relative sense).
Thank, David
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Matt J
2013년 9월 20일
편집: Matt J
2013년 9월 20일
1. Dunno. See also my comment above.
2. I don't think you can manually alter the meaning of the built-in stopping criteria. However, you can impose your own customized stopping criteria using the OutputFcn option. You can also quasi-deactivate built-in criteria e.g., by setting TolX=0. Unfortunately, it doesn't let you set TolX<0, which would completely deactivate it.
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