Example #1
0
func SplitFile(dataset *hector.DataSet, total, part int) (*hector.DataSet, *hector.DataSet) {

	train := hector.NewDataSet()
	test := hector.NewDataSet()

	for i, sample := range dataset.Samples {
		if i%total == part {
			test.AddSample(sample)
		} else {
			train.AddSample(sample)
		}
	}
	return train, test
}
Example #2
0
func main() {
	train_path, _, _, method, params := hector.PrepareParams()
	global, _ := strconv.ParseInt(params["global"], 10, 64)
	profile, _ := params["profile"]
	dataset := hector.NewDataSet()
	dataset.Load(train_path, global)

	cv, _ := strconv.ParseInt(params["cv"], 10, 32)
	total := int(cv)

	if profile != "" {
		f, err := os.Create(profile)
		if err != nil {
			log.Fatal(err)
		}
		pprof.StartCPUProfile(f)
		defer pprof.StopCPUProfile()
	}

	average_auc := 0.0
	for part := 0; part < total; part++ {
		train, test := SplitFile(dataset, total, part)
		classifier := hector.GetClassifier(method)

		auc, _ := hector.AlgorithmRunOnDataSet(classifier, train, test, "", params)
		fmt.Println("AUC:")
		fmt.Println(auc)
		average_auc += auc
		classifier = nil
	}
	fmt.Println(average_auc / float64(total))
}
Example #3
0
func main() {
	train_path, _, _, _, _ := hector.PrepareParams()
	dataset := hector.NewDataSet()
	dataset.Load(train_path, -1)

	context := Context{feature_iv: hector.InformationValue(dataset)}
	fmt.Println(context)
	handler := ContextHandler{c: context, f: FeatureHandler}
	http.Handle("/", handler)
	http.ListenAndServe(":8080", nil)
}
Example #4
0
func main() {
	train_path, test_path, pred_path, _, params := hector.PrepareParams()
	total := 5
	methods := []string{"ftrl", "fm"}
	all_methods_predictions := [][]*eval.LabelPrediction{}
	all_methods_test_predictions := [][]*eval.LabelPrediction{}
	for _, method := range methods {
		fmt.Println(method)
		average_auc := 0.0
		all_predictions := []*eval.LabelPrediction{}
		for part := 0; part < total; part++ {
			train, test, _ := SplitFile(train_path, total, part)
			classifier := hector.GetClassifier(method)

			auc, predictions, _ := hector.AlgorithmRun(classifier, train, test, "", params)
			fmt.Println("AUC:")
			fmt.Println(auc)
			average_auc += auc
			os.Remove(train)
			os.Remove(test)
			classifier = nil
			for _, pred := range predictions {
				all_predictions = append(all_predictions, pred)
			}
		}
		all_methods_predictions = append(all_methods_predictions, all_predictions)
		fmt.Println(average_auc / float64(total))

		classifier := hector.GetClassifier(method)
		fmt.Println(test_path)
		_, test_predictions, _ := hector.AlgorithmRun(classifier, train_path, test_path, "", params)
		all_methods_test_predictions = append(all_methods_test_predictions, test_predictions)
	}

	var wait sync.WaitGroup
	wait.Add(2)
	dataset := core.NewDataSet()
	go func() {
		for i, _ := range all_methods_predictions[0] {
			sample := core.NewSample()
			sample.Label = all_methods_predictions[0][i].Label
			for j, _ := range all_methods_predictions {
				feature := core.Feature{Id: int64(j), Value: all_methods_predictions[j][i].Prediction}
				sample.AddFeature(feature)
			}
			dataset.Samples <- sample
		}
		close(dataset.Samples)
		wait.Done()
	}()

	ensembler := lr.LinearRegression{}
	go func() {
		ensembler.Init(params)
		ensembler.Train(dataset)
		wait.Done()
	}()
	wait.Wait()

	fmt.Println(ensembler.Model)

	wait.Add(2)
	test_dataset := hector.NewDataSet()
	go func() {
		for i, _ := range all_methods_test_predictions[0] {
			sample := hector.NewSample()
			sample.Label = all_methods_test_predictions[0][i].Prediction
			for j, _ := range all_methods_test_predictions {
				feature := hector.Feature{Id: int64(j), Value: all_methods_test_predictions[j][i].Prediction}
				sample.AddFeature(feature)
			}
			test_dataset.Samples <- sample
		}
		close(test_dataset.Samples)
		wait.Done()
	}()

	go func() {
		pred_file, _ := os.Create(test_path + ".out")
		for sample := range test_dataset.Samples {
			prediction := sample.Label //ensembler.Predict(sample)
			pred_file.WriteString(strconv.FormatFloat(prediction, 'g', 5, 64) + "\n")
		}
		defer pred_file.Close()
		wait.Done()
	}()
	wait.Wait()
}