Fix for #634#638

Merged

henrydingliu merged 6 commits intocasact:masterfrom

danielfong-act:master

Jan 5, 2026

Commits on Dec 30, 2025

Added exposure adjustment to barnzehn.py. Updated ptf example gallary with exposure adjustments to match paper.
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Merge branch 'master' of https://github.com/danielfong-act/chainladder-python
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fixed bug when not passing sample_weight to BarnettZehnwirth.fit. updated plot_ptf_resid in gallery.
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Commits on Jan 3, 2026

removed sample_weight from barnettzehnwirth.fit
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unremoved sample_weight from barnettzehnwirth.fit -- the estimator ignores it as it did originall
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Commits on Jan 5, 2026

fixed graph title
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