[Ifeffit] unable to export xdi file in xas viewer

[Matt Newville]

Hi George,

Very sorry, that should have been
 delta_fit = 0.0*result.best_fit
It's now fixed in github master, and I verified that I could actually
export a model from pre-edge peak fitting in XAS_Viewer.



On Wed, Apr 29, 2020 at 10:31 AM George Sterbinsky <
GeorgeSterbinsky at u.northwestern.edu> wrote:

> Hi Matt and all,
>
> Unfortunately, after a clean install of larch following the source
> installation instructions, I am not able export any fits to xdi files, and
> a different error, shown below, is now printed in the terminal. Please let
> me know if any additional information would be helpful in solving this
> issue.
>
> Thank you,
> George
>
>
> Traceback (most recent call last):
>   File
> "/opt/anaconda3/lib/python3.7/site-packages/xraylarch-0.9.47-py3.7.egg/larch/wxxas/prepeak_panel.py",
> line 366, in onExportFitResult
>     yerr=yerr, x=x)
>   File
> "/opt/anaconda3/lib/python3.7/site-packages/xraylarch-0.9.47-py3.7.egg/larch/io/export_modelresult.py",
> line 59, in export_modelresult
>     delta_fit = 0.0*result_best_fit
> NameError: name 'result_best_fit' is not defined
>
>
>
>
> On Tue, Apr 21, 2020 at 9:25 AM Matt Newville <newville at cars.uchicago.edu>
> wrote:
>
>> Hi George,
>>
>> Hm, sorry about that.  It seems to be saying that the parameter
>> uncertainties weren't calculated correctly.  It probably should not even be
>> trying to estimate the uncertainty in the model.  I believe it should be
>> fixed in git master for larch, and I'll see about looking for this in lmfit
>> too.
>>
>> On Mon, Apr 20, 2020 at 4:00 PM George Sterbinsky <
>> GeorgeSterbinsky at u.northwestern.edu> wrote:
>>
>>> Hello,
>>>
>>> When attempting to export an xdi file for a pre-edge peak fit in XAS
>>> viewer, the error message below prints to the terminal and the xdi file is
>>> not generated. I can provide the project file and instructions for
>>> generating the error message if that would be helpful.
>>>
>>> Thank you,
>>> George
>>>
>>>
>>> Traceback (most recent call last):
>>>   File
>>> "/anaconda3/lib/python3.7/site-packages/larch/wxxas/prepeak_panel.py", line
>>> 369, in onExportFitResult
>>>     yerr=yerr, x=x)
>>>   File
>>> "/anaconda3/lib/python3.7/site-packages/larch/io/export_modelresult.py",
>>> line 60, in export_modelresult
>>>     delta_fit = result.eval_uncertainty(result.params, **kwargs)
>>>   File "/anaconda3/lib/python3.7/site-packages/lmfit/model.py", line
>>> 1488, in eval_uncertainty
>>>     dval = pars[pname].stderr/3.0
>>> TypeError: unsupported operand type(s) for /: 'NoneType' and 'float'
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>>
>>
>> --
>> --Matt Newville <newville at cars.uchicago.edu> 630-252-0431
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-- 
--Matt Newville <newville at cars.uchicago.edu> 630-252-0431
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