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Is your model actually bad, or is R-squared just lying to you?

You just retrained your model and R-squared went up. Great! Except it might not have gotten better, you just got lucky with the split. Or worse, R-squared is low and you scrap a model that was actually fine. Either way, you're optimizing the wrong number. R-squared tells you how much of the variati…

Read the full story at DEV Community — Machine Learning ↗

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  1. 2026-09-25 19:20 · DEV Community — Machine Learning
    Is your model actually bad, or is R-squared just lying to you?

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