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Hi Paul,</div>
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Thank you very much for your email and for providing all the helpful links. It helps a lot!</div>
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I have found that the Raspberry model is not suitable for my systems, so I have created a plugin model using the power law and a cylinder. However, I needed to include the hayter_msa as structure factor. The tutorial showed how to include the structure factor
in these plugin models, and I tried to follow the same steps.</div>
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<img id="image_0" width="390" height="240" style="width: 390px; height: 240px;" data-outlook-trace="F:1|T:1" src="cid:86df6596-a5bf-4b17-a433-caa8f0f6b7a6"></div>
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<img style="max-width: 1886px;" data-outlook-trace="F:1|T:1" src="cid:7ecbfbc7-e18e-4ea2-ae0b-2d12632bc35c"></div>
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But when I tried to do that I am getting an error message in Sasview as </div>
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<img id="image_1" width="1885" height="80" style="width: 1885px; height: 80px;" data-outlook-trace="F:1|T:1" src="cid:f6b1c3fe-8b00-4a40-a367-286adf4d1faf"></div>
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I tried to multiply the plugin model with structure factor, but I do not get the screen that I am supposed to get. </div>
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I am using sasview 6.0.0a1 which I downloaded from the github. </div>
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Could you please look into it and tell me what is the source of the error?</div>
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Best regards,</div>
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Rini PR</div>
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PhD candidate</div>
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Institute for Energy Technology (IFE)</div>
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Kjeller, Norway</div>
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Workplace:</div>
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Soft and Complex matter lab</div>
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Department of Physics</div>
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Norwegian University of Science and Technology (NTNU)</div>
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Trondheim, Norway</div>
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<b>From:</b> Paul Butler <butlerpd@udel.edu><br>
<b>Sent:</b> Wednesday, April 17, 2024 16:46<br>
<b>To:</b> Rini P R <rinipr@stud.ntnu.no><br>
<b>Cc:</b> users@sasview.org <users@sasview.org><br>
<b>Subject:</b> Re: [SasView Users] Inquiry regarding fitting the SAXS data</div>
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<span style="font-family: Arial, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">Hi Rini,</span></p>
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<span style="font-family: Arial, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">Just to clarify your question. I assume you are saying that the “raspberry model,” which was developed by the Pozzo group at the University of Washington to model pickering
emulsions is not suitable for your case and you have developed your own plugin model?</span></p>
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<span style="font-family: Arial, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">Or is the question how to write a plugin model based on a model you have developed theoretically? Or is the question that your plugin does not allow you to multiply a structure
factor with it?. Or are you wanting to write your own structure factor plugin? If in fact that next to last is what you are looking for, that should be pretty straightforward. Basically you will need to define the effective radius for interactions in your
plugin model as described here: </span><span style="font-family: Arial, sans-serif; font-size: 11pt;"><a href="https://www.sasview.org/docs/user/qtgui/Perspectives/Fitting/plugin.html#form-factors" id="OWAfe623d91-0f90-e032-3cc9-69bc9393b984" class="OWAAutoLink" data-auth="NotApplicable" data-loopstyle="linkonly" style="margin-top: 0px; margin-bottom: 0px;">https://www.sasview.org/docs/user/qtgui/Perspectives/Fitting/plugin.html#form-factors</a></span></p>
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<span style="font-family: Arial, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">If you also want to be able to include the beta approximation option you will also need to calculate the F(Q) in your model (currently would require a c model) and declare that
Fq is available in the python part of your model as described here: </span><span style="font-family: Arial, sans-serif; font-size: 11pt;"><a href="https://www.sasview.org/docs/user/qtgui/Perspectives/Fitting/plugin.html#structure-factors" id="OWAe8ddff28-fbec-3257-8699-d13958e1bfe7" class="OWAAutoLink" data-auth="NotApplicable" data-loopstyle="linkonly" style="margin-top: 0px; margin-bottom: 0px;">https://www.sasview.org/docs/user/qtgui/Perspectives/Fitting/plugin.html#structure-factors</a></span></p>
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<span style="font-family: Arial, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">Finally, if you want to create a structure factor you just need to include that flag (structure_factor=true) as explained here:
</span><span style="font-family: Arial, sans-serif; font-size: 11pt;"><a href="https://www.sasview.org/docs/user/qtgui/Perspectives/Fitting/plugin.html#model-definition" id="OWAb5d9f106-844c-d68e-3994-9db3dcd2a084" class="OWAAutoLink" data-auth="NotApplicable" data-loopstyle="linkonly" style="margin-top: 0px; margin-bottom: 0px;">https://www.sasview.org/docs/user/qtgui/Perspectives/Fitting/plugin.html#model-definition</a></span></p>
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<span style="font-family: Arial, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">Also we now have a tutorial on writing custom models available here:
</span><span style="font-family: Arial, sans-serif; font-size: 11pt;"><a href="https://www.sasview.org/downloads/creating_custom_fitting_models_in_sasview_v5.pdf" id="OWA4ac23419-c1d5-ce44-2b47-691b55514765" class="OWAAutoLink" data-auth="NotApplicable" data-loopstyle="linkonly" style="margin-top: 0px; margin-bottom: 0px;">https://www.sasview.org/downloads/creating_custom_fitting_models_in_sasview_v5.pdf</a></span></p>
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<span style="font-family: Arial, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">Let me know if any of this helps, if you need more information, or if you are looking for something completely different</span></p>
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<span style="font-family: Arial, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">Stay safe</span></p>
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<span style="font-family: Arial, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">Paul Butler</span></p>
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<span style="font-family: Arial, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">developer team member</span></p>
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<div style="direction: ltr;">On Wed, Apr 17, 2024 at 5:11 AM Rini P R via users <<a href="mailto:users@lists.sasview.org" id="OWA77bea5df-354c-cfc0-4355-cd4153f041a2" class="OWAAutoLink" data-loopstyle="linkonly">users@lists.sasview.org</a>> wrote:</div>
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Dear SasView Team,</div>
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I hope this message finds you well. My name is Rini and I am a PhD candidate in the Department of Physics at the Norwegian University of Science and Technology, Trondheim, Norway.</div>
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I have a specific question and I'm not sure who to contact. We are working with Pickering emulsions made with food-grade materials and have encountered challenges in fitting the data from our recent SAXS experiment with the available models. We have concluded
that combining a structure factor with our current plugin model will enable us to fit our data and extract the information we need.</div>
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Could you please direct me to the right person or help me get in touch with someone who can assist us with modifying the model as described?</div>
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Thank you in advance for your time and support.</div>
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Best regards,</div>
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Rini PR</div>
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PhD candidate</div>
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Institute for Energy Technology (IFE)</div>
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Kjeller, Norway</div>
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Workplace:</div>
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Soft and Complex matter lab</div>
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Department of Physics</div>
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Norwegian University of Science and Technology (NTNU)</div>
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Trondheim, Norway</div>
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