KwickClips Python · 41 sec · free
Why keep a test set hidden?
Short answer. Otherwise a model that memorised the data would still look perfect.
What does test_size=0.2 mean?
One fifth of the data is kept for testing.
Remember
| Learn on the training set |
| Check on the hidden test set |
Your model scored full marks on data it saw. Proof? No. Train test split keeps twenty percent hidden. The model learns from the train part. We check it on the test part only. Two rules. Learn on training data. Check on test data.
This clip is from the full lesson: Machine Learning in Python with Scikit-learn — 7 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: CBSE Class 11 Artificial Intelligence (843)
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