[SciPy-Dev] tol parameter to minimize_scalar is inconsistent [without HTML this time]
Thu Sep 12 01:08:34 CDT 2013
Micky Latowicki wrote:
> I'd like to ask/suggest something about minimize_scalar. It seems to me
> that the tol parameter is relative tolerance when the method is 'brent'
> and absolute tolerance when the method is 'bounded'. Isn't this confusing?
This appears to be correct. It is indeed confusing.
You might want to submit a bug report about this. See
> Perhaps this parameter should be deprecated, until both methods can
> support either relative or absolute tolerance? Meanwhile, parameters
> with names such as 'abs_xtol' and 'rel_xtol' can be introduced, and
> invalid combinations of parameters and method would be rejected with a
This should at least be documented. On the other hand, adding support
for both relative and absolute tolerances in underlying solvers might
not be too hard.
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