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Class weka.gui.boundaryvisualizer.BoundaryVisualizer 

java.lang.Object
    |
    +----java.awt.Component
            |
            +----java.awt.Container
                    |
                    +----javax.swing.JComponent
                            |
                            +----javax.swing.JPanel
                                    |
                                    +----weka.gui.boundaryvisualizer.BoundaryVisualizer
public class BoundaryVisualizer
extends javax.swing.JPanel
BoundaryVisualizer. Allows the visualization of classifier decision boundaries in two dimensions. A supplied classifier is first trained on supplied training data, then a data generator (currently using kernels) is used to generate new instances at points fixed in the two visualization dimensions but random in the other dimensions. These instances are classified by the classifier and plotted as points with colour corresponding to the probability distribution predicted by the classifier. At present, 2 * 2^(# non-fixed dimensions) points are generated from each kernel per pixel in the display. In practice, fewer points than this are actually classified because kernels are weighted (on a per-pixel basis) according to the fixexd dimensions and kernels corresponding to the lowest 1% of the weight mass are discarded. Predicted probability distributions are weighted (acording to the fixed visualization dimensions) and averaged to produce an RGB value for the pixel. For more information, see

Eibe Frank and Mark Hall (2003). Visualizing Class Probability Estimators. Working Paper 02/03, Department of Computer Science, University of Waikato.

Since:
1.0
Version:
$Revision: 1.11 $
Author:
Mark Hall
See Also:
javax.swing.JPanel

Constructor Index

o BoundaryVisualizer()
Creates a new BoundaryVisualizer instance.

Method Index

o getInstances()
Get the training instances
o main(String[])
Main method for testing this class
o setClassifier(Classifier)
Set a classifier to use
o setInstances(Instances)
Set the training instances

Constructor Detail

o BoundaryVisualizer
public BoundaryVisualizer()
          Creates a new BoundaryVisualizer instance.

Method Detail

o setClassifier
public void setClassifier(Classifier newClassifier) throws java.lang.Exception
          Set a classifier to use
Parameters:
newClassifier - the classifier to use
Throws:
java.lang.Exception - if an error occurs
o getInstances
public Instances getInstances()
          Get the training instances
Returns:
the training instances
o setInstances
public void setInstances(Instances inst) throws java.lang.Exception
          Set the training instances
Parameters:
inst - the instances to use
o main
public static void main(java.lang.String args[])
          Main method for testing this class
Parameters:
args - a String[] value 
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