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The Waikato Environment for Knowledge Analysis (WEKA), a machine learning workbench. This version represents the developer version, the "bleeding edge" of development, you could say. New functionality gets added to this version.

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{
	"flow_name" : "learnAndSaveModel",
	"steps" : [
		{
			"class" : "weka.knowledgeflow.steps.Loader",
			"properties" : {
				"loader" : {
					"type" : "loader",
					"class" : "weka.core.converters.ArffLoader",
					"filePath" : "weka/gui/beans/templates/credit-g.arff",
					"useRelativePath" : false
				},
				"name" : "ArffLoader"
			},
			"connections" : {
				"dataSet" : [
					"ClassAssigner"
				]
			},
			"coordinates" : "79,80"
		},
		{
			"class" : "weka.knowledgeflow.steps.ClassAssigner",
			"properties" : {
				"classColumn" : "last",
				"name" : "ClassAssigner"
			},
			"connections" : {
				"dataSet" : [
					"TrainingSetMaker"
				]
			},
			"coordinates" : "239,80"
		},
		{
			"class" : "weka.knowledgeflow.steps.Note",
			"properties" : {
				"name" : "Note",
				"noteText" : "Double click to configure me\nwith an ARFF file"
			},
			"connections" : {
			},
			"coordinates" : "26,178"
		},
		{
			"class" : "weka.knowledgeflow.steps.Note",
			"properties" : {
				"name" : "Note2",
				"noteText" : "Double click to\nspecify the class\nattribute"
			},
			"connections" : {
			},
			"coordinates" : "232,178"
		},
		{
			"class" : "weka.knowledgeflow.steps.Classifier",
			"properties" : {
				"classifier" : {
					"type" : "optionHandler",
					"class" : "weka.classifiers.trees.J48",
					"options" : "-C 0.25 -M 2"
				},
				"loadClassifierFileName" : "",
				"name" : "J48",
				"resetIncrementalClassifier" : false,
				"updateIncrementalClassifier" : true
			},
			"connections" : {
				"batchClassifier" : [
					"SerializedModelSaver"
				],
				"text" : [
					"TextViewer"
				]
			},
			"coordinates" : "281,295"
		},
		{
			"class" : "weka.knowledgeflow.steps.TrainingSetMaker",
			"properties" : {
				"name" : "TrainingSetMaker"
			},
			"connections" : {
				"trainingSet" : [
					"J48"
				]
			},
			"coordinates" : "439,80"
		},
		{
			"class" : "weka.knowledgeflow.steps.SerializedModelSaver",
			"properties" : {
				"filenamePrefix" : "exampleModel",
				"includeRelationNameInFilename" : false,
				"incrementalSaveSchedule" : 0,
				"name" : "SerializedModelSaver",
				"outputDirectory" : "${user.home}"
			},
			"connections" : {
			},
			"coordinates" : "521,295"
		},
		{
			"class" : "weka.knowledgeflow.steps.TextViewer",
			"properties" : {
				"name" : "TextViewer"
			},
			"connections" : {
			},
			"coordinates" : "41,295"
		},
		{
			"class" : "weka.knowledgeflow.steps.Note",
			"properties" : {
				"name" : "Note3",
				"noteText" : "Make the dataset into\na training set"
			},
			"connections" : {
			},
			"coordinates" : "513,98"
		},
		{
			"class" : "weka.knowledgeflow.steps.Note",
			"properties" : {
				"name" : "Note4",
				"noteText" : "Learn a decision tree\n(double click to configure\noptions)"
			},
			"connections" : {
			},
			"coordinates" : "246,385"
		},
		{
			"class" : "weka.knowledgeflow.steps.Note",
			"properties" : {
				"name" : "Note5",
				"noteText" : "Double click to configure\na filename prefix and\ndirectory to save the\nmodel to"
			},
			"connections" : {
			},
			"coordinates" : "597,302"
		},
		{
			"class" : "weka.knowledgeflow.steps.Note",
			"properties" : {
				"name" : "Note6",
				"noteText" : "Collects the textual\ndescription of the\nmodel."
			},
			"connections" : {
			},
			"coordinates" : "26,381"
		},
		{
			"class" : "weka.knowledgeflow.steps.Note",
			"properties" : {
				"name" : "Note7",
				"noteText" : "NOTE: this flow is configured to run out of the box. It loads an ARFF file as a resource from the classpath. If you want \nto use your own data, edit the ArffLoader. The model is saved as \"exampleModelJ48_1_1.model\" to your home directory\n(Java property \"user.home\")."
			},
			"connections" : {
			},
			"coordinates" : "31,6"
		}
	]
}