[SciPy-Dev] Doc error in scipy.optimize.fmin and missing info in ref guide
Fri Mar 19 14:37:05 CDT 2010
On Fri, Mar 19, 2010 at 3:16 PM, David Goldsmith
> On Mon, Mar 15, 2010 at 4:05 PM, Rob Clewley <email@example.com> wrote:
>> In both my old version and the one in the svn trunk there is an
>> inconsistency in the docstring of scipy.optimize.fmin.
>> Other Parameters
>> xtol : float
>> Relative error in xopt acceptable for convergence.
>> ftol : number
>> Relative error in func(xopt) acceptable for convergence.
>> As you see from the following code snippet from the body of the
>> function, the convergence test is in terms of absolute error for both
>> x and f, as the sim array contains x values and fsim the function
>> if (max(numpy.ravel(abs(sim[1:]-sim))) <= xtol \
>> and max(abs(fsim-fsim[1:])) <= ftol):
> OK, folks, so what's the _desired_ behavior: absolute or relative
> error (i.e., where's the bug: in the code or in the doc)?
I think the docs should reflect the actual behavior of the function.
Whether the criteria will be changed and made consistent across
functions is a different question. But it's not a bug, so the docs
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