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Ch. 19 Interpret Model (Overall impact (treats each feature as a…
Ch. 19 Interpret Model
Overall impact
treats each feature as a standalone for the target
ranks based on importance
Feature Impact
models importance relative to model that retained all of it's features
Create models with fewer features to avoid overfitting
Directional Impact
Run with new sample size
Find LogLoss
Use variable effect screen
compare red vs blue
red bars are values with positive cases
blue bars are for negative
Partial Impact
Model X-Ray
constructs list of features ranked by influence on target
forms graph, y axis is frequency
Re sort by clicking effect list
Power of Language
Top blender models take advantage of certain features
use word cloud
search for words like 'of' that can be predictive
Hotspots
shows most relevant features
Reason Codes
Puts a layout for each topic or feature
Riley Hillis
riley.hillis@colorado.edu