How to log the size of W-J48 Tree?

wessel

Dear All,

How can I log the value of the the size of W-J48 Tree?

E.g.


Number of Leaves  : 7
Size of the tree : 13

Best regards,

Wessel

Marco_Boeck

Hi,

I fear that you will need the "Execute Script" operator. Please see the following process for an example:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<process version="6.0.004">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="6.0.004" expanded="true" name="Process">
    <process expanded="true">
      <operator activated="true" class="retrieve" compatibility="6.0.004" expanded="true" height="60" name="Retrieve Golf" width="90" x="45" y="30">
        <parameter key="repository_entry" value="//Samples/data/Golf"/>
      </operator>
      <operator activated="true" class="weka:W-J48" compatibility="5.3.001" expanded="true" height="76" name="W-J48" width="90" x="179" y="30"/>
      <operator activated="true" class="execute_script" compatibility="6.0.004" expanded="true" height="76" name="Execute Script" width="90" x="313" y="30">
        <parameter key="script" value="import com.rapidminer.operator.learner.weka.WekaClassifier;&#10;import weka.classifiers.trees.J48;&#10;import com.rapidminer.tools.LogService;&#10;import java.util.logging.Level;&#10;&#10;WekaClassifier classifier = (WekaClassifier)input[0];&#10;J48 j48 = classifier.getClassifier();&#10;LogService.getRoot().log(Level.INFO, &quot;WEKA TREE SIZE: &quot;+j48.measureTreeSize());&#10;LogService.getRoot().log(Level.INFO, &quot;WEKA LEAF NUMBER: &quot;+j48.measureNumLeaves());&#10;&#10;return input[0];"/>
      </operator>
      <connect from_op="Retrieve Golf" from_port="output" to_op="W-J48" to_port="training set"/>
      <connect from_op="W-J48" from_port="model" to_op="Execute Script" to_port="input 1"/>
      <connect from_op="Execute Script" from_port="output 1" to_port="result 1"/>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
      <portSpacing port="sink_result 2" spacing="0"/>
    </process>
  </operator>
</process>

Regards,
Marco

wessel

Thanks a million Marco!