Ticket #7369 (closed: fixed)
Fitting with Convolution of functions
Reported by: | Vickie Lynch | Owned by: | Roman Tolchenov |
---|---|---|---|
Priority: | major | Milestone: | Release 2.6 |
Component: | Framework | Keywords: | |
Cc: | saviciat@… | Blocked By: | |
Blocking: | Tester: | Vickie Lynch |
Description
When fitting with convolutions, the parameters in the first function of the convolution are not changed during the optimization. Here is the function before and after fitting (not a good fit):
91 name=LinearBackground,A0=0.0,A1=0.0;(composite=Convolution;name=Gaussian,Height=3582,PeakCentre=0.16,Sigma=0.02;name=BackToBackExponential,I=3582,A=100.0,B=100.0,X0=0.16,S=0.02) 91 name=LinearBackground,A0=656.339,A1=0.277;(composite=Convolution;name=Gaussian,Height=3582,PeakCentre=0.16,Sigma=0.02;name=BackToBackExponential,I=-640.883,A=323.506,B=0.00579332,X0=0.072726,S=-4.6928e-07)
This also happens when fitting from the MantidPlot window Fit Function.
There is no wiki page about Convolution.
Change History
comment:1 Changed 7 years ago by Vickie Lynch
- Owner set to Roman Tolchenov
- Status changed from new to assigned
- type changed from enhancement to defect
comment:3 Changed 7 years ago by Roman Tolchenov
Added an attribute to unfix the resolution in a fit. Re #7369
Changeset: d135d02c1a06b85d44f2c6852c6cba8bfdb663f7
comment:4 Changed 7 years ago by Roman Tolchenov
Fixing the builds. Re #7369.
Changeset: fbb890735592e1738e468b78db6859c47a97255f
comment:5 Changed 7 years ago by Roman Tolchenov
- Status changed from accepted to verify
- Resolution set to fixed
Branch
feature/7369_convolution_fit
comment:6 Changed 7 years ago by Vickie Lynch
- Status changed from verify to verifying
- Tester set to Vickie Lynch
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Hi Roman, Do you have time to fix this fitting problem? I need this fixed for my ticket #6940 to have all the required fitting options work correctly.