Spotting BayesianRidge’s Uncertainty Bug
💡See how a real BayesianRidge bug changed uncertainty estimates between scikit-learn 1.8 and 1.9.
⚡ 30-Second TL;DR
What Changed
scikit-learn 1.9 includes a fix for BayesianRidge uncertainty calculations.
Why It Matters
Users relying on BayesianRidge uncertainty estimates may see different results after upgrading to scikit-learn 1.9. The change is particularly relevant for workflows that use uncertainty to guide decisions, prioritization, or risk estimates.
What To Do Next
Run the linked scikit-verify notebook against your BayesianRidge pipeline and compare uncertainty outputs before and after upgrading to scikit-learn 1.9.
Key Points
- •scikit-learn 1.9 includes a fix for BayesianRidge uncertainty calculations.
- •The notebook traces predict behavior in scikit-learn 1.8 and 1.9.
- •The exercise compares the formulas executed by both versions rather than relying only on release notes.
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Original source: Reddit r/MachineLearning ↗
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