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Ch. 19 Interpret Model (The Overall Impact of a Feature Adjusted for the…
Ch. 19 Interpret Model
Feature Impacts on Target
Four types of relationships a feature can have with a target
1) Overall Impact of a feature without consideration of the impact of other features
2)overall impact of a feature adjusted for the impact of other features
3)directional impact of a feature
4)partial impact of a feature
The Overall Impact of Feature on the Target Without Consideration of other Features
treats each feature as a standalone effect on the target
Green importance measure
The Overall Impact of a Feature Adjusted for the Impact of other Features
Feature Impact
Compute feature impact
calculation of the value of each feature in the context of this model
Tree-Based Variation Importance does not demand high degree of scrutiny
useful b/c generate using minimum of processing power but contains less accurate info than what may be retrieved from selecting feature impact
The Directional Impact of Features on Target
whether the presence of a value helps the model
The Partial Impact of Features on Target
Hotspots
shows the most relevant (up to four) combinations of features and their effect on the target
James Frainey
Jafr4672@colorado.edu