Explorer+graph+visualization+plugins

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= 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 classifier.


 * Note:** This is also covered in chapter //Extending WEKA// of the WEKA manual in versions later than 3.7.0 or snapshots of the developer version later than 10/01/2010.

= Requirements = > >
 * custom visualization class must implement the following **interface**
 * the class must **either** reside in the following **package** (visualization classes are automatically discovered during run-time)
 * or the class' package must be listed in the key of the  file.

= Implementation = The visualization interface contains the following four methods > This method returns the //minimal// version (inclusive) of Weka that is necessary to execute the plugin, e.g.,. > This method returns the //maximal// version (exclusive) of Weka that is necessary to execute the plugin, e.g.,. > Returns the actual version of Weka this plugin was designed for, e.g., > The 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.
 * **getMinVersion**
 * **getMaxVersion**
 * **getDesignVersion**
 * **getVisualizeMenuItem**

= Examples =

prefuse visualization toolkit
The example uses the [|prefuse visualization toolkit] (prefuse-beta, 2007.10.21). It is based on the demo class.

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



= Downloads =
 * [[file:PrefuseGraph.java]]

= See also =
 * Use Weka in your Java code - general overview of the basic Weka API
 * Explorer visualization plugins
 * Explorer tree visualization plugins

= Links =
 * [|Prefuse homepage]
 * [|PAP - prefuse assistance pool]