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Author Topic: How to try several k on kmeans  (Read 599 times)
Remixman
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Posts: 3


« on: July 28, 2013, 11:32:15 AM »

If I want to try k-means with difference k and show the performance of each k. What is the operator must to use.


Thank you
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StaryVena
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Posts: 119


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« Reply #1 on: July 28, 2013, 12:21:57 PM »

Hello Remixman,
here is a small example with parameter optimization and performance logging:

Code:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<process version="5.3.009">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="5.3.009" expanded="true" name="Process">
    <process expanded="true">
      <operator activated="true" class="retrieve" compatibility="5.3.009" expanded="true" height="60" name="Retrieve Sonar" width="90" x="45" y="30">
        <parameter key="repository_entry" value="//Samples/data/Sonar"/>
      </operator>
      <operator activated="true" class="optimize_parameters_grid" compatibility="5.3.009" expanded="true" height="94" name="Optimize Parameters (Grid)" width="90" x="246" y="30">
        <list key="parameters">
          <parameter key="k-NN.k" value="[1.0;100.0;10;linear]"/>
        </list>
        <process expanded="true">
          <operator activated="true" class="x_validation" compatibility="5.0.000" expanded="true" height="112" name="Validation" width="90" x="45" y="30">
            <description>A cross-validation evaluating a decision tree model.</description>
            <process expanded="true">
              <operator activated="true" class="k_nn" compatibility="5.3.009" expanded="true" height="76" name="k-NN" width="90" x="45" y="30">
                <parameter key="k" value="100"/>
              </operator>
              <connect from_port="training" to_op="k-NN" to_port="training set"/>
              <connect from_op="k-NN" from_port="model" to_port="model"/>
              <portSpacing port="source_training" spacing="0"/>
              <portSpacing port="sink_model" spacing="0"/>
              <portSpacing port="sink_through 1" spacing="0"/>
            </process>
            <process expanded="true">
              <operator activated="true" class="apply_model" compatibility="5.0.000" expanded="true" height="76" name="Apply Model" width="90" x="45" y="30">
                <list key="application_parameters"/>
              </operator>
              <operator activated="true" class="performance" compatibility="5.0.000" expanded="true" height="76" name="Performance" width="90" x="179" y="30"/>
              <connect from_port="model" to_op="Apply Model" to_port="model"/>
              <connect from_port="test set" to_op="Apply Model" to_port="unlabelled data"/>
              <connect from_op="Apply Model" from_port="labelled data" to_op="Performance" to_port="labelled data"/>
              <connect from_op="Performance" from_port="performance" to_port="averagable 1"/>
              <portSpacing port="source_model" spacing="0"/>
              <portSpacing port="source_test set" spacing="0"/>
              <portSpacing port="source_through 1" spacing="0"/>
              <portSpacing port="sink_averagable 1" spacing="0"/>
              <portSpacing port="sink_averagable 2" spacing="0"/>
            </process>
          </operator>
          <operator activated="true" class="log" compatibility="5.3.009" expanded="true" height="76" name="Log" width="90" x="179" y="75">
            <list key="log">
              <parameter key="performance" value="operator.Validation.value.performance"/>
              <parameter key="k" value="operator.k-NN.parameter.k"/>
            </list>
          </operator>
          <connect from_port="input 1" to_op="Validation" to_port="training"/>
          <connect from_op="Validation" from_port="averagable 1" to_op="Log" to_port="through 1"/>
          <connect from_op="Log" from_port="through 1" to_port="performance"/>
          <portSpacing port="source_input 1" spacing="0"/>
          <portSpacing port="source_input 2" spacing="0"/>
          <portSpacing port="sink_performance" spacing="0"/>
          <portSpacing port="sink_result 1" spacing="0"/>
        </process>
      </operator>
      <connect from_op="Retrieve Sonar" from_port="output" to_op="Optimize Parameters (Grid)" to_port="input 1"/>
      <connect from_op="Optimize Parameters (Grid)" from_port="performance" to_port="result 1"/>
      <connect from_op="Optimize Parameters (Grid)" from_port="parameter" to_port="result 2"/>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
      <portSpacing port="sink_result 2" spacing="0"/>
      <portSpacing port="sink_result 3" spacing="0"/>
    </process>
  </operator>
</process>

Best,
Václav
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Image processing extension developer.
Remixman
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Posts: 3


« Reply #2 on: July 29, 2013, 01:10:32 AM »

That's I want. Thank you very much.
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