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Machine Learning with R Cookbook, Second Edition

You're reading from   Machine Learning with R Cookbook, Second Edition Analyze data and build predictive models

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Product type Paperback
Published in Oct 2017
Publisher Packt
ISBN-13 9781787284395
Length 572 pages
Edition 2nd Edition
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Authors (2):
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Ashish Bhatia Ashish Bhatia
Author Profile Icon Ashish Bhatia
Ashish Bhatia
Yu-Wei, Chiu (David Chiu) Yu-Wei, Chiu (David Chiu)
Author Profile Icon Yu-Wei, Chiu (David Chiu)
Yu-Wei, Chiu (David Chiu)
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Toc

Table of Contents (15) Chapters Close

Preface 1. Practical Machine Learning with R FREE CHAPTER 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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