Fix calculation of curve fit weights (backport #1224) #1262
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### Summary This PR updates calculation of weights to compute residual in the curve fitting. ### Details and comments When the error bar of data points is significantly small, these data points become a dominant source of residual to minimize. This means other data points contribute little to the fit, and causes local overfit to certain data points. This is fixed by clipping the weights to remove outlier. (cherry picked from commit 6a06e74)
wshanks
approved these changes
Sep 5, 2023
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This is an automatic backport of pull request #1224 done by Mergify.
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