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Description
This fixes the y value used in Lagrangian interpolation to use the values in the local interval rather than only the ones at the beginning of the array. Tests have been added for correctness for several orders of interpolation with spot checks over all the interpolation orders we use in the
EnergyFunctionFilter
.Fixes #2765
Checklist
- [ ] I have followed the style guidelines for Python source files (if applicable)- [ ] I have made corresponding changes to the documentation (if applicable)