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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" : "cvTemplate",
	"steps" : [
		{
			"class" : "weka.knowledgeflow.steps.Loader",
			"properties" : {
				"loader" : {
					"type" : "loader",
					"class" : "weka.core.converters.ArffLoader",
					"filePath" : "weka/gui/knowledgeflow/templates/iris.arff",
					"useRelativePath" : false
				},
				"name" : "ArffLoader"
			},
			"connections" : {
				"dataSet" : [
					"ClassAssigner"
				]
			},
			"coordinates" : "80,80"
		},
		{
			"class" : "weka.knowledgeflow.steps.ClassAssigner",
			"properties" : {
				"classColumn" : "last",
				"name" : "ClassAssigner"
			},
			"connections" : {
				"dataSet" : [
					"CrossValidationFoldMaker"
				]
			},
			"coordinates" : "240,80"
		},
		{
			"class" : "weka.knowledgeflow.steps.CrossValidationFoldMaker",
			"properties" : {
				"name" : "CrossValidationFoldMaker",
				"numFolds" : "10",
				"preserveOrder" : false,
				"seed" : "1"
			},
			"connections" : {
				"trainingSet" : [
					"J48"
				],
				"testSet" : [
					"J48"
				]
			},
			"coordinates" : "440,80"
		},
		{
			"class" : "weka.knowledgeflow.steps.ClassifierPerformanceEvaluator",
			"properties" : {
				"errorPlotPointSizeProportionalToMargin" : false,
				"evaluationMetricsToOutput" : "Correct,Incorrect,Kappa,Total cost,Average cost,KB relative,KB information,Correlation,Complexity 0,Complexity scheme,Complexity improvement,MAE,RMSE,RAE,RRSE,Coverage,Region size,TP rate,FP rate,Precision,Recall,F-measure,MCC,ROC area,PRC area",
				"name" : "ClassifierPerformanceEvaluator"
			},
			"connections" : {
				"text" : [
					"TextViewer"
				],
				"visualizableError" : [
					"ModelPerformanceChart"
				]
			},
			"coordinates" : "360,280"
		},
		{
			"class" : "weka.knowledgeflow.steps.TextViewer",
			"properties" : {
				"name" : "TextViewer"
			},
			"connections" : {
			},
			"coordinates" : "640,280"
		},
		{
			"class" : "weka.knowledgeflow.steps.ModelPerformanceChart",
			"properties" : {
				"name" : "ModelPerformanceChart",
				"offscreenAdditionalOpts" : "",
				"offscreenHeight" : "400",
				"offscreenRendererName" : "Weka Chart Renderer",
				"offscreenWidth" : "500",
				"offscreenXAxis" : "",
				"offscreenYAxis" : ""
			},
			"connections" : {
			},
			"coordinates" : "120,280"
		},
		{
			"class" : "weka.knowledgeflow.steps.Note",
			"properties" : {
				"name" : "Note",
				"noteText" : "Double click to configure me\nwith an ARFF file"
			},
			"connections" : {
			},
			"coordinates" : "34,168"
		},
		{
			"class" : "weka.knowledgeflow.steps.Note",
			"properties" : {
				"name" : "Note2",
				"noteText" : "Double click to\nspecify the class\nattribute"
			},
			"connections" : {
			},
			"coordinates" : "236,171"
		},
		{
			"class" : "weka.knowledgeflow.steps.Note",
			"properties" : {
				"name" : "Note3",
				"noteText" : "10-fold CV by default.\nDouble click to alter\nthe number of folds."
			},
			"connections" : {
			},
			"coordinates" : "372,171"
		},
		{
			"class" : "weka.knowledgeflow.steps.Note",
			"properties" : {
				"name" : "Note4",
				"noteText" : "Performance results\nreported here. Right-click\nand choose \"show results\""
			},
			"connections" : {
			},
			"coordinates" : "602,377"
		},
		{
			"class" : "weka.knowledgeflow.steps.Note",
			"properties" : {
				"name" : "Note5",
				"noteText" : "Right-click and select \"show chart\"\nto see scatter plot and misclassified\npoints."
			},
			"connections" : {
			},
			"coordinates" : "50,380"
		},
		{
			"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" : [
					"ClassifierPerformanceEvaluator"
				]
			},
			"coordinates" : "640,80"
		},
		{
			"class" : "weka.knowledgeflow.steps.Note",
			"properties" : {
				"name" : "Note6",
				"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."
			},
			"connections" : {
			},
			"coordinates" : "23,11"
		}
	]
}