Asked by Hadas Lapid
on 14 Nov 2013

Following classification with ClassificationTree.fit I get an object obj which contains all model parameters. Then when using predict(data,model) I try it on new data. Question is that I need to translate the predict code into human language, in order to transform it into c code. The code does Not support predict. Can anyone direct me to the full algorithm predict performs? (I couldn't figure it out from predict.m directly..) Many many thanks Hadas

Answer by Shashank Prasanna
on 14 Nov 2013

Edited by Shashank Prasanna
on 14 Nov 2013

Accepted answer

Type:

>> view(obj)

you can visualize the tree.

predict generates predictions by following the branches of tree until it reaches a leaf node or a missing value. If predict reaches a leaf node, it returns the classification of that node.

This information is also available in the documentation, scroll down to Algorithm section:

http://www.mathworks.com/help/stats/compactclassificationtree.predict.html

Also here is some theory that you may find useful:

http://www.mathworks.com/help/stats/classification-trees-and-regression-trees.html#bsw6a62

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