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Machine Learning with R Cookbook, Second Edition - Second Edition

You're reading from  Machine Learning with R Cookbook, Second Edition - Second Edition

Product type Book
Published in Oct 2017
Publisher Packt
ISBN-13 9781787284395
Pages 572 pages
Edition 2nd Edition
Languages
Author (1):
Yu-Wei, Chiu (David Chiu) Yu-Wei, Chiu (David Chiu)
Profile icon Yu-Wei, Chiu (David Chiu)
Toc

Table of Contents (21) Chapters close

Title Page
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface
1. Practical Machine Learning with R 2. Data Exploration with Air Quality Datasets 3. Analyzing Time Series Data 4. R and Statistics 5. Understanding Regression Analysis 6. Survival Analysis 7. Classification 1 - Tree, Lazy, and Probabilistic 8. Classification 2 - Neural Network and SVM 9. Model Evaluation 10. Ensemble Learning 11. Clustering 12. Association Analysis and Sequence Mining 13. Dimension Reduction 14. Big Data Analysis (R and Hadoop)

Control parameters in conditional inference trees


In the preceding recipe, we saw how to use ctree for control inference trees. We can tweak the algorithm by specifying the control parameters.

Getting ready

You have completed the previous recipe and now understand the ctree function.

How to do it...

Perform the following steps in R:

> ctree.model = ctree(churn ~ . , data = trainset, 
controls=ctree_control(testtype = "MonteCarlo", mincriterion =
0.90, minbucket = 15))> ctree.model

How it works...

This recipe is a continuation of the previous recipe, providing some control parameters using a controls argument to the ctree function. We said we are going to use the MonteCarlo simulation with minimum weight on node at 15 and mincriterion at 0.90. We can also use Bonferroni, Univariate, and Teststatistic in place of MonteCarlo. There are many other parameters that can be changed.

See also

For more, execute the following command:

> help(ctree_control)

Or use the following command:

> ?ctree_control...
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