Re: [PyMca] Baseline calculation using SNIPModule.py

[PyMca g. p. m. list. <pym...@li...>]

Dear Ana Júlia,


The PyMca5.PyMca importing approach is there for backwards compatibility 
but sometimes it does not properly work with relative imports.


Please use the full import:


from PyMca5.PyMcaMath import SNIPModule


It should work.


Best regards,


Armando


On 27/01/2025 17:35, PyMca general purpose mailing list. wrote:
> Dear PyMca community,
> I am attempting to calculate the XRF spectrum baseline itself (without 
> the fit) using the PyMca module, specifically using the SNIP 
> algorithm. While searching on GitHub, I found the SNIP|Module.py| and 
> tried to import it to use the function 
> |getSpectrumBackground(spectrum, width, roi_min=None, roi_max=None, 
> smoothing=1)|. However, when importing the module, I encountered the 
> following error:
> ImportError: cannot import name 'SpecfitFuns' from 
> 'PyMca5.PyMca.fitting' 
> (/opt/micromamba/envs/pymca_env/lib/python3.8/site-packages/PyMca5/PyMcaGui/math/fitting/__init__.py)
>
> It seems that I already have the compiled version of |SpecfitFuns|, 
> but I am unsure what went wrong. I am attaching an image of the 
> terminal for your review.
>
> Additionally, I would like to confirm if this is the proper way to 
> calculate the baseline using the SNIP algorithm without any graphical 
> interface. I have already created a script to perform the fit using 
> the methods |ClassMcaTheory().estimate()| and |startfit()|, along with 
> a configuration file specifying the parameters. If I’m not mistaken, 
> the "continuum" key in the result of |startfit()| represents the 
> baseline, correct? Is there a way to obtain the baseline without 
> having to perform the fit first?
>
> I would greatly appreciate any advice or guidance on how to resolve 
> this issue.
> Best regards,
>
> Ana Júlia
> Intern at Sirius - The Brazilian Synchrotron Light Laboratory (LNLS)
>
>
>
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