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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" : "ROC curves for two classifiers",
	"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" : "43,335"
		},
		{
			"class" : "weka.knowledgeflow.steps.ClassAssigner",
			"properties" : {
				"classColumn" : "last",
				"name" : "ClassAssigner"
			},
			"connections" : {
				"dataSet" : [
					"ClassValuePicker"
				]
			},
			"coordinates" : "43,206"
		},
		{
			"class" : "weka.knowledgeflow.steps.CrossValidationFoldMaker",
			"properties" : {
				"name" : "CrossValidationFoldMaker",
				"numFolds" : "10",
				"preserveOrder" : false,
				"seed" : "1"
			},
			"connections" : {
				"trainingSet" : [
					"Logistic",
					"RandomForest"
				],
				"testSet" : [
					"Logistic",
					"RandomForest"
				]
			},
			"coordinates" : "363,46"
		},
		{
			"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"
				],
				"thresholdData" : [
					"ModelPerformanceChart"
				]
			},
			"coordinates" : "683,206"
		},
		{
			"class" : "weka.knowledgeflow.steps.TextViewer",
			"properties" : {
				"name" : "TextViewer"
			},
			"connections" : {
			},
			"coordinates" : "483,206"
		},
		{
			"class" : "weka.knowledgeflow.steps.ModelPerformanceChart",
			"properties" : {
				"name" : "ModelPerformanceChart",
				"offscreenAdditionalOpts" : "",
				"offscreenHeight" : "400",
				"offscreenRendererName" : "Weka Chart Renderer",
				"offscreenWidth" : "500",
				"offscreenXAxis" : "",
				"offscreenYAxis" : ""
			},
			"connections" : {
			},
			"coordinates" : "683,375"
		},
		{
			"class" : "weka.knowledgeflow.steps.Note",
			"properties" : {
				"name" : "Note",
				"noteText" : "Double click to configure me\nwith your own ARFF file"
			},
			"connections" : {
			},
			"coordinates" : "22,419"
		},
		{
			"class" : "weka.knowledgeflow.steps.Note",
			"properties" : {
				"name" : "Note2",
				"noteText" : "Double click to\nspecify the class\nattribute"
			},
			"connections" : {
			},
			"coordinates" : "123,219"
		},
		{
			"class" : "weka.knowledgeflow.steps.Note",
			"properties" : {
				"name" : "Note3",
				"noteText" : "Performance results\nreported here. Right-click\nand choose \"show results\""
			},
			"connections" : {
			},
			"coordinates" : "461,149"
		},
		{
			"class" : "weka.knowledgeflow.steps.Note",
			"properties" : {
				"name" : "Note4",
				"noteText" : "Right-click and select \n\"show chart\" to see\nROC curves for both\nclassifiers"
			},
			"connections" : {
			},
			"coordinates" : "564,304"
		},
		{
			"class" : "weka.knowledgeflow.steps.Classifier",
			"properties" : {
				"classifier" : {
					"type" : "optionHandler",
					"class" : "weka.classifiers.functions.Logistic",
					"options" : "-R 1.0E-8 -M -1"
				},
				"loadClassifierFileName" : "",
				"name" : "Logistic",
				"resetIncrementalClassifier" : false,
				"updateIncrementalClassifier" : true
			},
			"connections" : {
				"batchClassifier" : [
					"ClassifierPerformanceEvaluator2"
				]
			},
			"coordinates" : "363,246"
		},
		{
			"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" : "ClassifierPerformanceEvaluator2"
			},
			"connections" : {
				"text" : [
					"TextViewer"
				],
				"thresholdData" : [
					"ModelPerformanceChart"
				]
			},
			"coordinates" : "483,375"
		},
		{
			"class" : "weka.knowledgeflow.steps.ClassValuePicker",
			"properties" : {
				"classValue" : "good",
				"name" : "ClassValuePicker"
			},
			"connections" : {
				"dataSet" : [
					"CrossValidationFoldMaker"
				]
			},
			"coordinates" : "43,46"
		},
		{
			"class" : "weka.knowledgeflow.steps.Note",
			"properties" : {
				"name" : "Note5",
				"noteText" : "Double click to\nchoose the class\nvalue to be considered\nas the \"positive\" class"
			},
			"connections" : {
			},
			"coordinates" : "115,98"
		},
		{
			"class" : "weka.knowledgeflow.steps.Classifier",
			"properties" : {
				"classifier" : {
					"type" : "optionHandler",
					"class" : "weka.classifiers.trees.RandomForest",
					"options" : "-I 100 -S 1 -num-slots 1 -K 0"
				},
				"loadClassifierFileName" : "",
				"name" : "RandomForest",
				"resetIncrementalClassifier" : false,
				"updateIncrementalClassifier" : true
			},
			"connections" : {
				"batchClassifier" : [
					"ClassifierPerformanceEvaluator"
				]
			},
			"coordinates" : "683,46"
		},
		{
			"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" : "10,5"
		}
	]
}