Changeset 830cf6b in sasmodels for doc/guide/resolution.rst
- Timestamp:
- Mar 28, 2019 5:48:37 PM (6 years ago)
- Branches:
- master, ticket-1257-vesicle-product, ticket_1156, ticket_822_more_unit_tests
- Children:
- b2f0e5d, abe4255
- Parents:
- e220acc (diff), 62dc889 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
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- 1 edited
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doc/guide/resolution.rst
r8d2df05 rdb1d9d5 1 1 .. resolution.rst 2 2 3 .. This is a port of the original SasView html help file sm_help to ReSTructured 3 .. This is a port of the original SasView html help file sm_help to ReSTructured 4 4 .. text by S King, ISIS, during SasView CodeCamp-III in Feb 2015. 5 5 … … 17 17 resolution contribution into a model calculation/simulation (which by definition 18 18 will be exact) to make it more representative of what has been measured 19 experimentally - a process called *smearing*. The Sasmodels component of SasView 19 experimentally - a process called *smearing*. The Sasmodels component of SasView 20 20 does the latter. 21 21 … … 32 32 33 33 .. note:: 34 Problems may be encountered if the data set loaded by SasView is a 35 concatenation of SANS data from several detector distances where, of 36 course, the worst Q resolution is next to the beam stop at each detector 37 distance. (This will also be noticeable in the residuals plot where 38 there will be poor overlap). SasView sensibly orders all the input 39 data points by increasing Q for nicer-looking plots, however, the dQ 40 data can then vary considerably from point to point. If 'Use dQ data' 41 smearing is selected then spikes may appear in the model fits, whereas 34 Problems may be encountered if the data set loaded by SasView is a 35 concatenation of SANS data from several detector distances where, of 36 course, the worst Q resolution is next to the beam stop at each detector 37 distance. (This will also be noticeable in the residuals plot where 38 there will be poor overlap). SasView sensibly orders all the input 39 data points by increasing Q for nicer-looking plots, however, the dQ 40 data can then vary considerably from point to point. If 'Use dQ data' 41 smearing is selected then spikes may appear in the model fits, whereas 42 42 if 'None' or 'Custom Pinhole Smear' are selected the fits look normal. 43 44 In such instances, possible solutions are to simply remove the data 45 with poor Q resolution from the shorter detector distances, or to fit 43 44 In such instances, possible solutions are to simply remove the data 45 with poor Q resolution from the shorter detector distances, or to fit 46 46 the data from different detector distances simultaneously. 47 47
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