[SciPy-User] lmfit: confidence intervals issue

[Sturla Molden]

lmfit is not a part of SciPy, but as long as it's scientific use of Python
and no other appropriate list, I don't think anyone will mind. I cannot
answer your question, though.

Sturla

Antonino Ingargiola <tritemio at gmail.com> wrote:
> Hi,
> 
> I'm not sure this is the right list for this kind of issues.
> 
> I'm using lmfit to solve a non-linear least square problem to fit a "noisy"
> histogram to a model that is a single exponential decay convoluted with a
> "sharp" peak and a baseline noise floor.
> 
> The problem is that unless I set constrains for the 'offset' parameter the
> confidence interval calculation fails in a strange way in scipy brentq
> function.
> 
> You can see the full example notebook and the error message in this ipython
> notebook:
> 
> <a
> href="http://nbviewer.ipython.org/urls/gist.githubusercontent.com/tritemio/901c2eb2a43775e81844/raw/755eede8f170cc33b96316601286ae534e901c49/lmfit%20issue">http://nbviewer.ipython.org/urls/gist.githubusercontent.com/tritemio/901c2eb2a43775e81844/raw/755eede8f170cc33b96316601286ae534e901c49/lmfit%20issue</a>
> 
> What can I do to fix the problem? If this is the normal behavior, a more
> informative error message would be helpful.
> 
> Thanks in advance for any help,
> Antonio
> 
> PS: Let me congratulate with the lmfit authors as this is a really amazing
> piece of software that should be included in scipy IMHO!
> 
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