Changeset fa307dd in sasview


Ignore:
Timestamp:
Mar 31, 2019 7:13:29 AM (7 months ago)
Author:
smk78
Branches:
master
Children:
b2964ef, d620d03c, c080c943
Parents:
6d7b252b
Message:

Updated Product Model section of fitting_help.rst

Location:
src/sas/sasgui/perspectives/fitting/media
Files:
3 added
1 edited

Legend:

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  • src/sas/sasgui/perspectives/fitting/media/fitting_help.rst

    r6d7b252b rfa307dd  
    6464^^^^^^^^^^^^^^ 
    6565 
     66S(Q) models can be combined with many models in the other categories to 
     67generate what SasView calls "product models". The combination can be done by 
     68one of two methods, but how they behave is slightly different. 
     69 
     70The first, most straightforward, method is simply to use the S(Q) drop-down in 
     71the FitPage: 
     72 
    6673.. figure:: p_and_s_buttons.png 
    6774 
    68 S(Q) models can be combined with models in the other categories to generate 
    69 what SasView calls "product models". See :ref:`Product_Models` for more 
    70 information. 
     75This example would then generate a product model with the following parameters: 
     76 
     77.. figure:: p_and_s_buttons_parameters.png 
     78 
     79The other method is to use the :ref:`Sum|Multi(p1,p2)` tool under Fitting > 
     80Plugin Model Operations: 
     81 
     82.. figure:: p_and_s_sum_model.png 
     83 
     84This creates a product model with the following parameters: 
     85 
     86.. figure:: p_and_s_sum_model_parameters.png 
     87 
     88As can be seen, the second method has produced a product model with an extra 
     89parameter: *radius_effective*. This is the radial distance determining the 
     90range of the $S(Q)$ interaction and may, or may not, be the same as the 
     91*radius*, in this example, depending on the concentration of the system. In 
     92other systems, *radius_effective* may depend on the particle form (shape). 
     93 
     94See :ref:`Product_Models` for more information. 
    7195 
    7296Show 1D/2D 
     
    225249Such a plugin should then be available in the S(Q) drop-down box on a FitPage (once 
    226250a P(Q) model has been selected). 
     251 
     252.. _Sum|Multi(p1,p2): 
    227253 
    228254Sum|Multi(p1,p2) 
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