Golang filters.NewChiMergeFilter函数代码示例

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本文整理汇总了Golang中github.com/sjwhitworth/golearn/filters.NewChiMergeFilter函数的典型用法代码示例。如果您正苦于以下问题：Golang NewChiMergeFilter函数的具体用法？Golang NewChiMergeFilter怎么用？Golang NewChiMergeFilter使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了NewChiMergeFilter函数的17个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Golang代码示例。

示例1: main

func main() {

	var tree base.Classifier

	rand.Seed(44111342)

	// Load in the iris dataset
	iris, err := base.ParseCSVToInstances("/home/kralli/go/src/github.com/sjwhitworth/golearn/examples/datasets/iris_headers.csv", true)
	if err != nil {
		panic(err)
	}

	// Discretise the iris dataset with Chi-Merge
	filt := filters.NewChiMergeFilter(iris, 0.999)
	for _, a := range base.NonClassFloatAttributes(iris) {
		filt.AddAttribute(a)
	}
	filt.Train()
	irisf := base.NewLazilyFilteredInstances(iris, filt)

	// Create a 60-40 training-test split
	//testData
	trainData, _ := base.InstancesTrainTestSplit(iris, 0.60)

	findBestSplit(trainData)

	//fmt.Println(trainData)
	//fmt.Println(testData)

	fmt.Println(tree)
	fmt.Println(irisf)
}

开发者ID:krallistic，项目名称:go_stuff，代码行数:32，代码来源:cart_tree.go

示例2: BenchmarkBaggingRandomForestPredict

func BenchmarkBaggingRandomForestPredict(t *testing.B) {
	inst, err := base.ParseCSVToInstances("../examples/datasets/iris_headers.csv", true)
	if err != nil {
		t.Fatal("Unable to parse CSV to instances: %s", err.Error())
	}

	rand.Seed(time.Now().UnixNano())
	filt := filters.NewChiMergeFilter(inst, 0.90)
	for _, a := range base.NonClassFloatAttributes(inst) {
		filt.AddAttribute(a)
	}
	filt.Train()
	instf := base.NewLazilyFilteredInstances(inst, filt)

	rf := new(BaggedModel)
	for i := 0; i < 10; i++ {
		rf.AddModel(trees.NewRandomTree(2))
	}

	rf.Fit(instf)
	t.ResetTimer()
	for i := 0; i < 20; i++ {
		rf.Predict(instf)
	}
}

开发者ID:GeekFreaker，项目名称:golearn，代码行数:25，代码来源:bagging_test.go

示例3: TestPruning

func TestPruning(testEnv *testing.T) {
	inst, err := base.ParseCSVToInstances("../examples/datasets/iris_headers.csv", true)
	if err != nil {
		panic(err)
	}
	trainData, testData := base.InstancesTrainTestSplit(inst, 0.6)
	filt := filters.NewChiMergeFilter(inst, 0.90)
	filt.AddAllNumericAttributes()
	filt.Build()
	fmt.Println(testData)
	filt.Run(testData)
	filt.Run(trainData)
	root := NewRandomTree(2)
	fittrainData, fittestData := base.InstancesTrainTestSplit(trainData, 0.6)
	root.Fit(fittrainData)
	root.Prune(fittestData)
	fmt.Println(root)
	predictions := root.Predict(testData)
	fmt.Println(predictions)
	confusionMat := eval.GetConfusionMatrix(testData, predictions)
	fmt.Println(confusionMat)
	fmt.Println(eval.GetMacroPrecision(confusionMat))
	fmt.Println(eval.GetMacroRecall(confusionMat))
	fmt.Println(eval.GetSummary(confusionMat))
}

开发者ID:hsinhoyeh，项目名称:golearn，代码行数:25，代码来源:tree_test.go

示例4: main

func main() {

	var tree base.Classifier

	rand.Seed(time.Now().UTC().UnixNano())

	// Load in the iris dataset
	iris, err := base.ParseCSVToInstances("../datasets/iris_headers.csv", true)
	if err != nil {
		panic(err)
	}

	// Discretise the iris dataset with Chi-Merge
	filt := filters.NewChiMergeFilter(iris, 0.99)
	filt.AddAllNumericAttributes()
	filt.Build()
	filt.Run(iris)

	// Create a 60-40 training-test split
	insts := base.InstancesTrainTestSplit(iris, 0.60)

	//
	// First up, use ID3
	//
	tree = trees.NewID3DecisionTree(0.6)
	// (Parameter controls train-prune split.)

	// Train the ID3 tree
	tree.Fit(insts[0])

	// Generate predictions
	predictions := tree.Predict(insts[1])

	// Evaluate
	fmt.Println("ID3 Performance")
	cf := eval.GetConfusionMatrix(insts[1], predictions)
	fmt.Println(eval.GetSummary(cf))

	//
	// Next up, Random Trees
	//

	// Consider two randomly-chosen attributes
	tree = trees.NewRandomTree(2)
	tree.Fit(insts[0])
	predictions = tree.Predict(insts[1])
	fmt.Println("RandomTree Performance")
	cf = eval.GetConfusionMatrix(insts[1], predictions)
	fmt.Println(eval.GetSummary(cf))

	//
	// Finally, Random Forests
	//
	tree = ensemble.NewRandomForest(100, 3)
	tree.Fit(insts[0])
	predictions = tree.Predict(insts[1])
	fmt.Println("RandomForest Performance")
	cf = eval.GetConfusionMatrix(insts[1], predictions)
	fmt.Println(eval.GetSummary(cf))
}

开发者ID:24hours，项目名称:golearn，代码行数:60，代码来源:trees.go

示例5: TestRandomForest1

func TestRandomForest1(testEnv *testing.T) {
	inst, err := base.ParseCSVToInstances("../examples/datasets/iris_headers.csv", true)
	if err != nil {
		panic(err)
	}

	rand.Seed(time.Now().UnixNano())
	trainData, testData := base.InstancesTrainTestSplit(inst, 0.6)
	filt := filters.NewChiMergeFilter(inst, 0.90)
	for _, a := range base.NonClassFloatAttributes(inst) {
		filt.AddAttribute(a)
	}
	filt.Train()
	trainDataf := base.NewLazilyFilteredInstances(trainData, filt)
	testDataf := base.NewLazilyFilteredInstances(testData, filt)
	rf := new(BaggedModel)
	for i := 0; i < 10; i++ {
		rf.AddModel(trees.NewRandomTree(2))
	}
	rf.Fit(trainDataf)
	fmt.Println(rf)
	predictions := rf.Predict(testDataf)
	fmt.Println(predictions)
	confusionMat := eval.GetConfusionMatrix(testDataf, predictions)
	fmt.Println(confusionMat)
	fmt.Println(eval.GetMacroPrecision(confusionMat))
	fmt.Println(eval.GetMacroRecall(confusionMat))
	fmt.Println(eval.GetSummary(confusionMat))
}

开发者ID:Gudym，项目名称:golearn，代码行数:29，代码来源:bagging_test.go

示例6: TestRandomForest1

func TestRandomForest1(testEnv *testing.T) {
	inst, err := base.ParseCSVToInstances("../examples/datasets/iris_headers.csv", true)
	if err != nil {
		panic(err)
	}

	rand.Seed(time.Now().UnixNano())
	insts := base.InstancesTrainTestSplit(inst, 0.6)
	filt := filters.NewChiMergeFilter(inst, 0.90)
	filt.AddAllNumericAttributes()
	filt.Build()
	filt.Run(insts[1])
	filt.Run(insts[0])
	rf := new(BaggedModel)
	for i := 0; i < 10; i++ {
		rf.AddModel(trees.NewRandomTree(2))
	}
	rf.Fit(insts[0])
	fmt.Println(rf)
	predictions := rf.Predict(insts[1])
	fmt.Println(predictions)
	confusionMat := eval.GetConfusionMatrix(insts[1], predictions)
	fmt.Println(confusionMat)
	fmt.Println(eval.GetMacroPrecision(confusionMat))
	fmt.Println(eval.GetMacroRecall(confusionMat))
	fmt.Println(eval.GetSummary(confusionMat))
}

开发者ID:24hours，项目名称:golearn，代码行数:27，代码来源:bagging_test.go

示例7: TestRandomTree

func TestRandomTree(testEnv *testing.T) {
	inst, err := base.ParseCSVToInstances("../examples/datasets/iris_headers.csv", true)
	if err != nil {
		panic(err)
	}

	filt := filters.NewChiMergeFilter(inst, 0.90)
	filt.AddAllNumericAttributes()
	filt.Build()
	filt.Run(inst)
	fmt.Println(inst)
	r := new(RandomTreeRuleGenerator)
	r.Attributes = 2
	root := InferID3Tree(inst, r)
	fmt.Println(root)
}

开发者ID:hsinhoyeh，项目名称:golearn，代码行数:16，代码来源:tree_test.go

示例8: TestRandomTreeClassificationAfterDiscretisation

func TestRandomTreeClassificationAfterDiscretisation(t *testing.T) {
	Convey("Predictions on filtered data with a Random Tree", t, func() {
		instances, err := base.ParseCSVToInstances("../examples/datasets/iris_headers.csv", true)
		So(err, ShouldBeNil)

		trainData, testData := base.InstancesTrainTestSplit(instances, 0.6)

		filter := filters.NewChiMergeFilter(instances, 0.9)
		for _, a := range base.NonClassFloatAttributes(instances) {
			filter.AddAttribute(a)
		}
		filter.Train()
		filteredTrainData := base.NewLazilyFilteredInstances(trainData, filter)
		filteredTestData := base.NewLazilyFilteredInstances(testData, filter)
		verifyTreeClassification(filteredTrainData, filteredTestData)
	})
}

开发者ID:CTLife，项目名称:golearn，代码行数:17，代码来源:tree_test.go

示例9: TestRandomForest

func TestRandomForest(t *testing.T) {
	Convey("Given a valid CSV file", t, func() {
		inst, err := base.ParseCSVToInstances("../examples/datasets/iris_headers.csv", true)
		So(err, ShouldBeNil)

		Convey("When Chi-Merge filtering the data", func() {
			filt := filters.NewChiMergeFilter(inst, 0.90)
			for _, a := range base.NonClassFloatAttributes(inst) {
				filt.AddAttribute(a)
			}
			filt.Train()
			instf := base.NewLazilyFilteredInstances(inst, filt)

			Convey("Splitting the data into test and training sets", func() {
				trainData, testData := base.InstancesTrainTestSplit(instf, 0.60)

				Convey("Fitting and predicting with a Random Forest", func() {
					rf := NewRandomForest(10, 3)
					err = rf.Fit(trainData)
					So(err, ShouldBeNil)

					predictions, err := rf.Predict(testData)
					So(err, ShouldBeNil)

					confusionMat, err := evaluation.GetConfusionMatrix(testData, predictions)
					So(err, ShouldBeNil)

					Convey("Predictions should be somewhat accurate", func() {
						So(evaluation.GetAccuracy(confusionMat), ShouldBeGreaterThan, 0.35)
					})
				})
			})
		})

		Convey("Fitting with a Random Forest with too many features compared to the data", func() {
			rf := NewRandomForest(10, len(base.NonClassAttributes(inst))+1)
			err = rf.Fit(inst)

			Convey("Should return an error", func() {
				So(err, ShouldNotBeNil)
			})
		})
	})
}

开发者ID:CTLife，项目名称:golearn，代码行数:44，代码来源:randomforest_test.go

示例10: TestRandomForest1

func TestRandomForest1(testEnv *testing.T) {
	inst, err := base.ParseCSVToInstances("../examples/datasets/iris_headers.csv", true)
	if err != nil {
		panic(err)
	}
	trainData, testData := base.InstancesTrainTestSplit(inst, 0.60)
	filt := filters.NewChiMergeFilter(trainData, 0.90)
	filt.AddAllNumericAttributes()
	filt.Build()
	filt.Run(testData)
	filt.Run(trainData)
	rf := NewRandomForest(10, 3)
	rf.Fit(trainData)
	predictions := rf.Predict(testData)
	fmt.Println(predictions)
	confusionMat := eval.GetConfusionMatrix(testData, predictions)
	fmt.Println(confusionMat)
	fmt.Println(eval.GetSummary(confusionMat))
}

开发者ID:hsinhoyeh，项目名称:golearn，代码行数:19，代码来源:randomforest_test.go

示例11: BenchmarkBaggingRandomForestFit

func BenchmarkBaggingRandomForestFit(testEnv *testing.B) {
	inst, err := base.ParseCSVToInstances("../examples/datasets/iris_headers.csv", true)
	if err != nil {
		panic(err)
	}

	rand.Seed(time.Now().UnixNano())
	filt := filters.NewChiMergeFilter(inst, 0.90)
	filt.AddAllNumericAttributes()
	filt.Build()
	filt.Run(inst)
	rf := new(BaggedModel)
	for i := 0; i < 10; i++ {
		rf.AddModel(trees.NewRandomTree(2))
	}
	testEnv.ResetTimer()
	for i := 0; i < 20; i++ {
		rf.Fit(inst)
	}
}

开发者ID:24hours，项目名称:golearn，代码行数:20，代码来源:bagging_test.go

示例12: TestBaggedModelRandomForest

func TestBaggedModelRandomForest(t *testing.T) {
	Convey("Given data", t, func() {
		inst, err := base.ParseCSVToInstances("../examples/datasets/iris_headers.csv", true)
		So(err, ShouldBeNil)

		Convey("Splitting the data into training and test data", func() {
			trainData, testData := base.InstancesTrainTestSplit(inst, 0.6)

			Convey("Filtering the split datasets", func() {
				rand.Seed(time.Now().UnixNano())
				filt := filters.NewChiMergeFilter(inst, 0.90)
				for _, a := range base.NonClassFloatAttributes(inst) {
					filt.AddAttribute(a)
				}
				filt.Train()
				trainDataf := base.NewLazilyFilteredInstances(trainData, filt)
				testDataf := base.NewLazilyFilteredInstances(testData, filt)

				Convey("Fitting and Predicting with a Bagged Model of 10 Random Trees", func() {
					rf := new(BaggedModel)
					for i := 0; i < 10; i++ {
						rf.AddModel(trees.NewRandomTree(2))
					}

					rf.Fit(trainDataf)
					predictions := rf.Predict(testDataf)

					confusionMat, err := evaluation.GetConfusionMatrix(testDataf, predictions)
					So(err, ShouldBeNil)

					Convey("Predictions are somewhat accurate", func() {
						So(evaluation.GetAccuracy(confusionMat), ShouldBeGreaterThan, 0.5)
					})
				})
			})
		})
	})
}

开发者ID:GeekFreaker，项目名称:golearn，代码行数:38，代码来源:bagging_test.go

示例13: TestRandomForest1

func TestRandomForest1(testEnv *testing.T) {
	inst, err := base.ParseCSVToInstances("../examples/datasets/iris_headers.csv", true)
	if err != nil {
		panic(err)
	}

	filt := filters.NewChiMergeFilter(inst, 0.90)
	for _, a := range base.NonClassFloatAttributes(inst) {
		filt.AddAttribute(a)
	}
	filt.Train()
	instf := base.NewLazilyFilteredInstances(inst, filt)

	trainData, testData := base.InstancesTrainTestSplit(instf, 0.60)

	rf := NewRandomForest(10, 3)
	rf.Fit(trainData)
	predictions := rf.Predict(testData)
	fmt.Println(predictions)
	confusionMat := eval.GetConfusionMatrix(testData, predictions)
	fmt.Println(confusionMat)
	fmt.Println(eval.GetSummary(confusionMat))
}

开发者ID:JacobXie，项目名称:golearn，代码行数:23，代码来源:randomforest_test.go

示例14: TestRandomTreeClassification2

func TestRandomTreeClassification2(testEnv *testing.T) {
	inst, err := base.ParseCSVToInstances("../examples/datasets/iris_headers.csv", true)
	if err != nil {
		panic(err)
	}
	insts := base.InstancesTrainTestSplit(inst, 0.4)
	filt := filters.NewChiMergeFilter(inst, 0.90)
	filt.AddAllNumericAttributes()
	filt.Build()
	fmt.Println(insts[1])
	filt.Run(insts[1])
	filt.Run(insts[0])
	root := NewRandomTree(2)
	root.Fit(insts[0])
	fmt.Println(root)
	predictions := root.Predict(insts[1])
	fmt.Println(predictions)
	confusionMat := eval.GetConfusionMatrix(insts[1], predictions)
	fmt.Println(confusionMat)
	fmt.Println(eval.GetMacroPrecision(confusionMat))
	fmt.Println(eval.GetMacroRecall(confusionMat))
	fmt.Println(eval.GetSummary(confusionMat))
}

开发者ID:24hours，项目名称:golearn，代码行数:23，代码来源:tree_test.go

示例15: TestRandomTreeClassification

func TestRandomTreeClassification(testEnv *testing.T) {
	inst, err := base.ParseCSVToInstances("../examples/datasets/iris_headers.csv", true)
	if err != nil {
		panic(err)
	}
	trainData, testData := base.InstancesTrainTestSplit(inst, 0.6)
	filt := filters.NewChiMergeFilter(inst, 0.90)
	filt.AddAllNumericAttributes()
	filt.Build()
	filt.Run(trainData)
	filt.Run(testData)
	fmt.Println(inst)
	r := new(RandomTreeRuleGenerator)
	r.Attributes = 2
	root := InferID3Tree(trainData, r)
	fmt.Println(root)
	predictions := root.Predict(testData)
	fmt.Println(predictions)
	confusionMat := eval.GetConfusionMatrix(testData, predictions)
	fmt.Println(confusionMat)
	fmt.Println(eval.GetMacroPrecision(confusionMat))
	fmt.Println(eval.GetMacroRecall(confusionMat))
	fmt.Println(eval.GetSummary(confusionMat))
}

开发者ID:hsinhoyeh，项目名称:golearn，代码行数:24，代码来源:tree_test.go

示例16: main

func main() {

	var tree base.Classifier

	rand.Seed(44111342)

	// Load in the iris dataset
	iris, err := base.ParseCSVToInstances("../datasets/iris_headers.csv", true)
	if err != nil {
		panic(err)
	}

	// Discretise the iris dataset with Chi-Merge
	filt := filters.NewChiMergeFilter(iris, 0.999)
	for _, a := range base.NonClassFloatAttributes(iris) {
		filt.AddAttribute(a)
	}
	filt.Train()
	irisf := base.NewLazilyFilteredInstances(iris, filt)

	// Create a 60-40 training-test split
	trainData, testData := base.InstancesTrainTestSplit(irisf, 0.60)

	//
	// First up, use ID3
	//
	tree = trees.NewID3DecisionTree(0.6)
	// (Parameter controls train-prune split.)

	// Train the ID3 tree
	err = tree.Fit(trainData)
	if err != nil {
		panic(err)
	}

	// Generate predictions
	predictions, err := tree.Predict(testData)
	if err != nil {
		panic(err)
	}

	// Evaluate
	fmt.Println("ID3 Performance (information gain)")
	cf, err := evaluation.GetConfusionMatrix(testData, predictions)
	if err != nil {
		panic(fmt.Sprintf("Unable to get confusion matrix: %s", err.Error()))
	}
	fmt.Println(evaluation.GetSummary(cf))

	tree = trees.NewID3DecisionTreeFromRule(0.6, new(trees.InformationGainRatioRuleGenerator))
	// (Parameter controls train-prune split.)

	// Train the ID3 tree
	err = tree.Fit(trainData)
	if err != nil {
		panic(err)
	}

	// Generate predictions
	predictions, err = tree.Predict(testData)
	if err != nil {
		panic(err)
	}

	// Evaluate
	fmt.Println("ID3 Performance (information gain ratio)")
	cf, err = evaluation.GetConfusionMatrix(testData, predictions)
	if err != nil {
		panic(fmt.Sprintf("Unable to get confusion matrix: %s", err.Error()))
	}
	fmt.Println(evaluation.GetSummary(cf))

	tree = trees.NewID3DecisionTreeFromRule(0.6, new(trees.GiniCoefficientRuleGenerator))
	// (Parameter controls train-prune split.)

	// Train the ID3 tree
	err = tree.Fit(trainData)
	if err != nil {
		panic(err)
	}

	// Generate predictions
	predictions, err = tree.Predict(testData)
	if err != nil {
		panic(err)
	}

	// Evaluate
	fmt.Println("ID3 Performance (gini index generator)")
	cf, err = evaluation.GetConfusionMatrix(testData, predictions)
	if err != nil {
		panic(fmt.Sprintf("Unable to get confusion matrix: %s", err.Error()))
	}
	fmt.Println(evaluation.GetSummary(cf))
	//
	// Next up, Random Trees
	//

	// Consider two randomly-chosen attributes
	tree = trees.NewRandomTree(2)
//.........这里部分代码省略.........

开发者ID:CTLife，项目名称:golearn，代码行数:101，代码来源:trees.go

示例17: TestRandomTreeClassification

func TestRandomTreeClassification(t *testing.T) {
	Convey("Predictions on filtered data with a Random Tree", t, func() {
		instances, err := base.ParseCSVToInstances("../examples/datasets/iris_headers.csv", true)
		So(err, ShouldBeNil)

		trainData, testData := base.InstancesTrainTestSplit(instances, 0.6)

		filter := filters.NewChiMergeFilter(instances, 0.9)
		for _, a := range base.NonClassFloatAttributes(instances) {
			filter.AddAttribute(a)
		}
		filter.Train()
		filteredTrainData := base.NewLazilyFilteredInstances(trainData, filter)
		filteredTestData := base.NewLazilyFilteredInstances(testData, filter)

		Convey("Using InferID3Tree to create the tree and do the fitting", func() {
			Convey("Using a RandomTreeRule", func() {
				randomTreeRuleGenerator := new(RandomTreeRuleGenerator)
				randomTreeRuleGenerator.Attributes = 2
				root := InferID3Tree(filteredTrainData, randomTreeRuleGenerator)

				Convey("Predicting with the tree", func() {
					predictions, err := root.Predict(filteredTestData)
					So(err, ShouldBeNil)

					confusionMatrix, err := evaluation.GetConfusionMatrix(filteredTestData, predictions)
					So(err, ShouldBeNil)

					Convey("Predictions should be somewhat accurate", func() {
						So(evaluation.GetAccuracy(confusionMatrix), ShouldBeGreaterThan, 0.5)
					})
				})
			})

			Convey("Using a InformationGainRule", func() {
				informationGainRuleGenerator := new(InformationGainRuleGenerator)
				root := InferID3Tree(filteredTrainData, informationGainRuleGenerator)

				Convey("Predicting with the tree", func() {
					predictions, err := root.Predict(filteredTestData)
					So(err, ShouldBeNil)

					confusionMatrix, err := evaluation.GetConfusionMatrix(filteredTestData, predictions)
					So(err, ShouldBeNil)

					Convey("Predictions should be somewhat accurate", func() {
						So(evaluation.GetAccuracy(confusionMatrix), ShouldBeGreaterThan, 0.5)
					})
				})
			})
		})

		Convey("Using NewRandomTree to create the tree", func() {
			root := NewRandomTree(2)

			Convey("Fitting with the tree", func() {
				err = root.Fit(filteredTrainData)
				So(err, ShouldBeNil)

				Convey("Predicting with the tree, *without* pruning first", func() {
					predictions, err := root.Predict(filteredTestData)
					So(err, ShouldBeNil)

					confusionMatrix, err := evaluation.GetConfusionMatrix(filteredTestData, predictions)
					So(err, ShouldBeNil)

					Convey("Predictions should be somewhat accurate", func() {
						So(evaluation.GetAccuracy(confusionMatrix), ShouldBeGreaterThan, 0.5)
					})
				})

				Convey("Predicting with the tree, pruning first", func() {
					root.Prune(filteredTestData)

					predictions, err := root.Predict(filteredTestData)
					So(err, ShouldBeNil)

					confusionMatrix, err := evaluation.GetConfusionMatrix(filteredTestData, predictions)
					So(err, ShouldBeNil)

					Convey("Predictions should be somewhat accurate", func() {
						So(evaluation.GetAccuracy(confusionMatrix), ShouldBeGreaterThan, 0.4)
					})
				})
			})
		})
	})
}

开发者ID:GeekFreaker，项目名称:golearn，代码行数:88，代码来源:tree_test.go

注：本文中的github.com/sjwhitworth/golearn/filters.NewChiMergeFilter函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。