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5 small wins to finish your path
Overfitting: keeping the score honest
A program tuned too closely to its examples scores well on them and badly on real traffic.
Outline
This lesson is an outline of what it will teach. The full lesson, with code you can run, is being written.
What this lesson covers
- Holding data back
- Signs of overfitting
- Re-checking on fresh cases
Why it matters
A customer judges the system on tomorrow's inputs, not yesterday's.
This is what real progress feels like.