Decoded Intelligence Signal
Feature Importance
advanced
strategy
Verified: May 27, 2026Lexicon Core Definition
A measure of how much each input feature contributes to a model's predictions; computed by tree-based models (Random Forest, XGBoost) as the average decrease in impurity across all decision nodes that use the feature.
Analysis Breakdown
A measure of how much each input feature contributes to a model's predictions; computed by tree-based models (Random Forest, XGBoost) as the average decrease in impurity across all decision nodes that use the feature. Full explanation coming soon when Journey 23 content is ingested.