Copyright © 2010 SAS Institute Inc. All rights reserved. Decision Trees Using SAS Sylvain Tremblay SAS Canada – Education SAS Halifax Regional User Group

Download Copyright © 2010 SAS Institute Inc. All rights reserved. Decision Trees Using SAS Sylvain Tremblay SAS Canada – Education SAS Halifax Regional User Group

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<ul><li>Slide 1</li></ul> <p>Copyright 2010 SAS Institute Inc. All rights reserved. Decision Trees Using SAS Sylvain Tremblay SAS Canada Education SAS Halifax Regional User Group April 29, 2011 Slide 2 2 Copyright 2010, SAS Institute Inc. All rights reserved. They come in all shapes and forms Slide 3 3 Copyright 2010, SAS Institute Inc. All rights reserved. They come in all shapes and forms Slide 4 4 Copyright 2010, SAS Institute Inc. All rights reserved. Agenda What is a decision tree? Decision trees using SAS Enterprise Miner Decision trees using JMP Conclusion / Questions Slide 5 5 Copyright 2010, SAS Institute Inc. All rights reserved. A Decision Tree is A predictive model A representation of the relationship between a target (dependant variable) and a set of inputs (independant variables) A supervised learning method A recursive partitionning algorithm Also know by the name of algorithms that were commercialized: CART (Classification And Regression Tree) CHAID (CHi-squared Automatic Interaction Detector) Slide 6 6 Copyright 2010, SAS Institute Inc. All rights reserved. Simple Prediction Illustration 0.00.50.10.20.30.40.60.70.80.91.0 0.0 0.5 0.1 0.2 0.3 0.4 0.6 0.7 0.8 0.9 1.0 x1x1 x2x2 Predict P(Y=1| X 1, X 2 ) Training Data... Slide 7 7 Copyright 2010, SAS Institute Inc. All rights reserved. Decision Tree Split Search 0.00.50.10.20.30.40.60.70.80.91.0 0.0 0.5 0.1 0.2 0.3 0.4 0.6 0.7 0.8 0.9 1.0 x1x1 x2x2 0.63 x2x2</p>