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Introduction

Introduction#

As of Weka version >3.5.8 (only developer version, not stable-3.6 branch) one can easily add graph visualization plugins in the Explorer (Classify panel). This makes it easy to implement custom visualizations, if the ones Weka offers are not sufficient. graph is referring to graphs generated, for instance, by the weka.classifiers.bayes.BayesNet classifier.

Note: This is also covered in chapter Extending WEKA of the WEKA manual in versions later than 3.7.0.

Requirements#

  • custom visualization class must implement the following interface

    weka.gui.visualize.plugins.GraphVisualizePlugin

  • the class must either reside in the following package (visualization classes are automatically discovered during run-time)

    weka.gui.visualize.plugins

  • or the class' package must be listed in the weka.gui.visualize.plugins.GraphVisualizePlugin key of the [weka/gui/GenericPropertiesCreator.props](weka_gui_genericpropertiescreator.props.md) file.

Implementation#

The visualization interface contains the following four methods

  • getMinVersion

    This method returns the minimal version (inclusive) of Weka that is necessary to execute the plugin, e.g., 3.5.0.

  • getMaxVersion

    This method returns the maximal version (exclusive) of Weka that is necessary to execute the plugin, e.g., 3.6.0.

  • getDesignVersion

    Returns the actual version of Weka this plugin was designed for, e.g., 3.5.1

  • getVisualizeMenuItem

    The JMenuItem that is returned via this method will be added to the plugins menu in the popup in the Explorer. The ActionListener for clicking the menu item will most likely open a new frame containing the visualized data.

Examples#

Prefuse visualization toolkit#

The PrefuseGraph.java. It is based on the prefuse.demos.GraphView demo class.

The following screenshot was generated using BayesNet on the UCI dataset anneal with the following parametrization:

weka.classifiers.bayes.BayesNet -D -Q weka.classifiers.bayes.net.search.local.K2 -- -P 3 -S BAYES -E weka.classifiers.bayes.net.estimate.SimpleEstimator -- -A 0.5

Screenshot

Downloads#

See also#