Python Idle
Which features matter? A model with 50 inputs might only care about 5 of them. Feature importance tells you where the signal lives — and where you're just adding noise. Today you'll train a RandomForest, ask it which features drove its decisions, and visualize the answer. The feature at the top of the chart might surprise you.
~15 minscenario20640 rows
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Goals: 4 tests
importances array should have correct length
most_important should be a string
should create a matplotlib plot
importances should sum to approximately 1.0
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