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sansigormacros / ncnrsansigormacros

Reduction software for small-angle neutron scattering used by multiple neutron scattering facilities..
https://www.nist.gov/ncnr/data-reduction-analysis/sans-software
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Fitting FCC paracrystals #331

Closed krzywon closed 4 years ago

krzywon commented 4 years ago

Dear Colleagues,

I am trying to fit the scattering curve from a SAXS experiment based on the aggregation in a FCC way of nanoparticles. Unfortunately, the fit does not work since nothing happens. This is the message appears afterwards:

V_chisq = 0 coef_FCC_ParaCrystal[0]= {0.0001,125,0.14,50,3.53e-05,9.45e-06,0.025} NULL wave fit time = 4.41636e-05 seconds

What can I do in order to get the fit? Could you please help me?

Thanks in advance!

Dr. Antoni Sanchez-Ferrer

krzywon commented 4 years ago

[srkline] Function was OK, it was a problem with the error column not being read in or generated correctly from SAXS data. Thus the chi-squared could not be calculated properly and the fit stopped immediately. This was resolved by generating a fake error column. I requested a copy of the original data file to see the actual format, but I haven't received it yet. Will try and patch the loader to account for it when I see it.

-Steve