protected override Tuple<IList<ISplittedData>, ISplittingParams, double> EvaluateCategoricalSplit(
            IDataFrame dataToSplit,
            string dependentFeatureName,
            string splittingFeatureName,
            double bestSplitQualitySoFar,
            double initialEntropy,
            ISplitQualityChecker splitQualityChecker,
            IAlredyUsedAttributesInfo alreadyUsedAttributesInfo)
        {
            if (alreadyUsedAttributesInfo.WasAttributeAlreadyUsed(splittingFeatureName))
            {
                return new Tuple<IList<ISplittedData>, ISplittingParams, double>(
                    new List<ISplittedData>(),
                    new SplittingParams(splittingFeatureName, dependentFeatureName),
                    double.NegativeInfinity);
            }
            var totalRowsCount = dataToSplit.RowCount;
            var splitParams = new SplittingParams(splittingFeatureName, dependentFeatureName);
            var splitData = CategoricalDataSplitter.SplitData(dataToSplit, splitParams);
            if (splitData.Count == 1)
            {
                return new Tuple<IList<ISplittedData>, ISplittingParams, double>(
                    new List<ISplittedData>(),
                    splitParams,
                    double.NegativeInfinity);
            }

            var splitQuality = splitQualityChecker.CalculateSplitQuality(initialEntropy, totalRowsCount, splitData, dependentFeatureName);
            return new Tuple<IList<ISplittedData>, ISplittingParams, double>(splitData, splitParams, splitQuality);
        }
예제 #2
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        protected override Tuple <IList <ISplittedData>, ISplittingParams, double> EvaluateCategoricalSplit(
            IDataFrame dataToSplit,
            string dependentFeatureName,
            string splittingFeatureName,
            double bestSplitQualitySoFar,
            double initialEntropy,
            ISplitQualityChecker splitQualityChecker,
            IAlredyUsedAttributesInfo alreadyUsedAttributesInfo)
        {
            if (alreadyUsedAttributesInfo.WasAttributeAlreadyUsed(splittingFeatureName))
            {
                return(new Tuple <IList <ISplittedData>, ISplittingParams, double>(
                           new List <ISplittedData>(),
                           new SplittingParams(splittingFeatureName, dependentFeatureName),
                           double.NegativeInfinity));
            }
            var totalRowsCount = dataToSplit.RowCount;
            var splitParams    = new SplittingParams(splittingFeatureName, dependentFeatureName);
            var splitData      = CategoricalDataSplitter.SplitData(dataToSplit, splitParams);

            if (splitData.Count == 1)
            {
                return(new Tuple <IList <ISplittedData>, ISplittingParams, double>(
                           new List <ISplittedData>(),
                           splitParams,
                           double.NegativeInfinity));
            }

            var splitQuality = splitQualityChecker.CalculateSplitQuality(initialEntropy, totalRowsCount, splitData, dependentFeatureName);

            return(new Tuple <IList <ISplittedData>, ISplittingParams, double>(splitData, splitParams, splitQuality));
        }
예제 #3
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 //TODO: AAA make it nicer - maybe encapsulate Tuple in some dto
 protected abstract Tuple <IList <ISplittedData>, ISplittingParams, double> EvaluateCategoricalSplit(
     IDataFrame dataToSplit,
     string dependentFeatureName,
     string splittingFeatureName,
     double bestSplitQualitySoFar,
     double initialEntropy,
     ISplitQualityChecker splitQualityChecker,
     IAlredyUsedAttributesInfo alredyUsedAttributesInfo);
        protected virtual IDecisionTreeNode BuildDecisionNode(
            IDataFrame dataFrame,
            string dependentFeatureName,
            IDecisionTreeModelBuilderParams additionalParams,
            IAlredyUsedAttributesInfo alreadyUsedAttributesInfo,
            int treeDepth,
            bool isFirstSplit = false)
        {
            if (dataFrame.GetColumnVector <object>(dependentFeatureName).DataItems.Distinct().Count() == 1 || MaximalTreeDepthHasBeenReached(additionalParams, treeDepth))
            {
                return(BuildLeaf(dataFrame, dependentFeatureName));
            }

            // TODO: later on add additional params indicating which features were already used
            ISplittingResult splitResult = BestSplitSelector.SelectBestSplit(
                dataFrame,
                dependentFeatureName,
                SplitQualityChecker,
                alreadyUsedAttributesInfo);

            if (SplitIsEmpty(splitResult))
            {
                return(BuildLeaf(dataFrame, dependentFeatureName));
            }

            if (additionalParams.UsePrunningHeuristicDuringTreeBuild && this.StatisticalSignificanceChecker != null)
            {
                var isSplitSignificant = StatisticalSignificanceChecker.IsSplitStatisticallySignificant(
                    dataFrame,
                    splitResult,
                    dependentFeatureName);
                if (!isSplitSignificant)
                {
                    return(BuildLeaf(dataFrame, dependentFeatureName));
                }
            }

            var children = new ConcurrentDictionary <IDecisionTreeLink, IDecisionTreeNode>();

            if (isFirstSplit)
            {
                Parallel.ForEach(
                    splitResult.SplittedDataSets,
                    splitData =>
                {
                    this.AddChildFromSplit(dependentFeatureName, additionalParams, splitData, children, alreadyUsedAttributesInfo, treeDepth + 1);
                });
            }
            else
            {
                foreach (var splitData in splitResult.SplittedDataSets)
                {
                    this.AddChildFromSplit(dependentFeatureName, additionalParams, splitData, children, alreadyUsedAttributesInfo, treeDepth + 1);
                }
            }
            return(BuildConcreteDecisionTreeNode(splitResult, children));
        }
 public ISplittingResult SelectBestSplit(
     IDataFrame baseData,
     string dependentFeatureName,
     ISplitQualityChecker splitQualityChecker,
     IAlredyUsedAttributesInfo alreadyUsedAttributesInfo)
 {
     if (!(splitQualityChecker is INumericalSplitQualityChecker))
     {
         throw new ArgumentException("Invalid split quality checker for numerical outcome");
     }
     return(SelectBestSplit(baseData, dependentFeatureName, (INumericalSplitQualityChecker)splitQualityChecker, alreadyUsedAttributesInfo));
 }
 public ISplittingResult SelectBestSplit(
     IDataFrame baseData,
     string dependentFeatureName,
     ISplitQualityChecker splitQualityChecker,
     IAlredyUsedAttributesInfo alreadyUsedAttributesInfo)
 {
     if (!(splitQualityChecker is INumericalSplitQualityChecker))
     {
         throw new ArgumentException("Invalid split quality checker for numerical outcome");
     }
     return SelectBestSplit(baseData, dependentFeatureName, (INumericalSplitQualityChecker)splitQualityChecker, alreadyUsedAttributesInfo);
 }
        protected override Tuple <IList <ISplittedData>, ISplittingParams, double> EvaluateCategoricalSplit(
            IDataFrame dataToSplit,
            string dependentFeatureName,
            string splittingFeatureName,
            double bestSplitQualitySoFar,
            double initialEntropy,
            ISplitQualityChecker splitQualityChecker,
            IAlredyUsedAttributesInfo alredyUsedAttributesInfo)
        {
            var    totalRowsCount          = dataToSplit.RowCount;
            var    uniqueFeatureValues     = dataToSplit.GetColumnVector(splittingFeatureName).Distinct();
            double locallyBestSplitQuality = double.NegativeInfinity;
            IBinarySplittingParams localBestSplitParams = null;
            IList <ISplittedData>  locallyBestSplitData = null;

            foreach (var featureValue in uniqueFeatureValues)
            {
                if (!alredyUsedAttributesInfo.WasAttributeAlreadyUsedWithValue(splittingFeatureName, featureValue))
                {
                    var binarySplitParams = new BinarySplittingParams(splittingFeatureName, featureValue, dependentFeatureName);
                    var splittedData      = CategoricalDataSplitter.SplitData(dataToSplit, binarySplitParams);
                    if (splittedData.Count == 1)
                    {
                        return(new Tuple <IList <ISplittedData>, ISplittingParams, double>(
                                   new List <ISplittedData>(),
                                   binarySplitParams,
                                   double.NegativeInfinity));
                    }

                    var splitQuality = splitQualityChecker.CalculateSplitQuality(
                        initialEntropy,
                        totalRowsCount,
                        splittedData,
                        dependentFeatureName);
                    if (splitQuality > locallyBestSplitQuality)
                    {
                        locallyBestSplitQuality = splitQuality;
                        locallyBestSplitData    = splittedData;
                        localBestSplitParams    = binarySplitParams;
                    }
                }
            }

            return(new Tuple <IList <ISplittedData>, ISplittingParams, double>(
                       locallyBestSplitData,
                       localBestSplitParams,
                       locallyBestSplitQuality));
        }
        public ISplittingResult SelectBestSplit(
            IDataFrame baseData,
            string dependentFeatureName,
            ISplitQualityChecker splitQualityChecker,
            IAlredyUsedAttributesInfo alreadyUsedAttributesInfo)
        {
            ISplittingResult bestSplit = null;
            double bestSplitQuality = float.NegativeInfinity;
            double initialEntropy = splitQualityChecker.GetInitialEntropy(baseData, dependentFeatureName);

            foreach (var attributeToSplit in baseData.ColumnNames.Except(new[] { dependentFeatureName }))
            {
                if (baseData.GetColumnType(attributeToSplit).TypeIsNumeric())
                {
                    // TODO: add checking for the already used attribtues
                    var bestNumericSplitPointAndQuality =
                        BinaryNumericBestSplitingPointSelector.FindBestSplitPoint(
                            baseData,
                            dependentFeatureName,
                            attributeToSplit,
                            splitQualityChecker,
                            BinaryNumericDataSplitter,
                            initialEntropy);
                    if (bestNumericSplitPointAndQuality.Item2 > bestSplitQuality)
                    {
                        bestSplitQuality = bestNumericSplitPointAndQuality.Item2;
                        bestSplit = bestNumericSplitPointAndQuality.Item1;
                    }
                }
                else
                {
                    var bestSplitForAttribute = EvaluateCategoricalSplit(
                        baseData,
                        dependentFeatureName,
                        attributeToSplit,
                        bestSplitQuality,
                        initialEntropy,
                        splitQualityChecker,
                        alreadyUsedAttributesInfo);
                    if (bestSplitForAttribute.Item3 > bestSplitQuality)
                    {
                        bestSplit = BuildBestSplitObject(bestSplitForAttribute.Item2, bestSplitForAttribute.Item1);
                        bestSplitQuality = bestSplitForAttribute.Item3;
                    }
                }
            }
            return bestSplit;
        }
예제 #9
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        public ISplittingResult SelectBestSplit(
            IDataFrame baseData,
            string dependentFeatureName,
            ISplitQualityChecker splitQualityChecker,
            IAlredyUsedAttributesInfo alreadyUsedAttributesInfo)
        {
            ISplittingResult bestSplit        = null;
            double           bestSplitQuality = float.NegativeInfinity;
            double           initialEntropy   = splitQualityChecker.GetInitialEntropy(baseData, dependentFeatureName);

            foreach (var attributeToSplit in baseData.ColumnNames.Except(new[] { dependentFeatureName }))
            {
                if (baseData.GetColumnType(attributeToSplit).TypeIsNumeric())
                {
                    // TODO: add checking for the already used attribtues
                    var bestNumericSplitPointAndQuality =
                        BinaryNumericBestSplitingPointSelector.FindBestSplitPoint(
                            baseData,
                            dependentFeatureName,
                            attributeToSplit,
                            splitQualityChecker,
                            BinaryNumericDataSplitter,
                            initialEntropy);
                    if (bestNumericSplitPointAndQuality.Item2 > bestSplitQuality)
                    {
                        bestSplitQuality = bestNumericSplitPointAndQuality.Item2;
                        bestSplit        = bestNumericSplitPointAndQuality.Item1;
                    }
                }
                else
                {
                    var bestSplitForAttribute = EvaluateCategoricalSplit(
                        baseData,
                        dependentFeatureName,
                        attributeToSplit,
                        bestSplitQuality,
                        initialEntropy,
                        splitQualityChecker,
                        alreadyUsedAttributesInfo);
                    if (bestSplitForAttribute.Item3 > bestSplitQuality)
                    {
                        bestSplit        = BuildBestSplitObject(bestSplitForAttribute.Item2, bestSplitForAttribute.Item1);
                        bestSplitQuality = bestSplitForAttribute.Item3;
                    }
                }
            }
            return(bestSplit);
        }
        protected override Tuple<IList<ISplittedData>, ISplittingParams, double> EvaluateCategoricalSplit(
            IDataFrame dataToSplit,
            string dependentFeatureName,
            string splittingFeatureName,
            double bestSplitQualitySoFar,
            double initialEntropy,
            ISplitQualityChecker splitQualityChecker,
            IAlredyUsedAttributesInfo alredyUsedAttributesInfo)
        {
            var totalRowsCount = dataToSplit.RowCount;
            var uniqueFeatureValues = dataToSplit.GetColumnVector(splittingFeatureName).Distinct();
            double locallyBestSplitQuality = double.NegativeInfinity;
            IBinarySplittingParams localBestSplitParams = null;
            IList<ISplittedData> locallyBestSplitData = null;
            foreach (var featureValue in uniqueFeatureValues)
            {
                if (!alredyUsedAttributesInfo.WasAttributeAlreadyUsedWithValue(splittingFeatureName, featureValue))
                {
                    var binarySplitParams = new BinarySplittingParams(splittingFeatureName, featureValue, dependentFeatureName);
                    var splittedData = CategoricalDataSplitter.SplitData(dataToSplit, binarySplitParams);
                    if (splittedData.Count == 1)
                    {
                        return new Tuple<IList<ISplittedData>, ISplittingParams, double>(
                            new List<ISplittedData>(),
                            binarySplitParams,
                            double.NegativeInfinity);
                    }

                    var splitQuality = splitQualityChecker.CalculateSplitQuality(
                        initialEntropy,
                        totalRowsCount,
                        splittedData,
                        dependentFeatureName);
                    if (splitQuality > locallyBestSplitQuality)
                    {
                        locallyBestSplitQuality = splitQuality;
                        locallyBestSplitData = splittedData;
                        localBestSplitParams = binarySplitParams;
                    }
                }
            }

            return new Tuple<IList<ISplittedData>, ISplittingParams, double>(
                locallyBestSplitData,
                localBestSplitParams,
                locallyBestSplitQuality);
        }
        protected virtual void AddChildFromSplit(
            string dependentFeatureName,
            IDecisionTreeModelBuilderParams additionalParams,
            ISplittedData splitData,
            ConcurrentDictionary <IDecisionTreeLink, IDecisionTreeNode> children,
            IAlredyUsedAttributesInfo alreadyUsedAttributesInfo,
            int treeDepth)
        {
            var decisionTreeNode = BuildDecisionNode(
                splitData.SplittedDataFrame,
                dependentFeatureName,
                additionalParams,
                alreadyUsedAttributesInfo,
                treeDepth);
            var link = splitData.SplitLink;

            children.TryAdd(link, decisionTreeNode);
        }
예제 #12
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 protected override void UpdateAlreadyUsedAttributes(ISplittingParams splittingParams, IAlredyUsedAttributesInfo alreadyUsedAttributesInfo)
 {
     alreadyUsedAttributesInfo.AddAlreadyUsedAttribute(splittingParams.SplitOnFeature);
 }
 protected override void UpdateAlreadyUsedAttributes(ISplittingParams splittingParams, IAlredyUsedAttributesInfo alreadyUsedAttributesInfo)
 {
     alreadyUsedAttributesInfo.AddAlreadyUsedAttribute(splittingParams.SplitOnFeature);
 }
        protected override void UpdateAlreadyUsedAttributes(ISplittingParams splittingParams, IAlredyUsedAttributesInfo alreadyUsedAttributesInfo)
        {
            var binarySplittingParams = splittingParams as IBinarySplittingParams;

            alreadyUsedAttributesInfo.AddAlreadyUsedAttribute(splittingParams.SplitOnFeature, binarySplittingParams.SplitOnValue);
        }
 protected override void UpdateAlreadyUsedAttributes(ISplittingParams splittingParams, IAlredyUsedAttributesInfo alreadyUsedAttributesInfo)
 {
     var binarySplittingParams = splittingParams as IBinarySplittingParams;
     alreadyUsedAttributesInfo.AddAlreadyUsedAttribute(splittingParams.SplitOnFeature, binarySplittingParams.SplitOnValue);
 }
예제 #16
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 protected abstract void UpdateAlreadyUsedAttributes(
     ISplittingParams splittingParams,
     IAlredyUsedAttributesInfo alreadyUsedAttributesInfo);
        protected virtual IDecisionTreeNode BuildDecisionNode(
            IDataFrame dataFrame, 
            string dependentFeatureName,
            IDecisionTreeModelBuilderParams additionalParams,
            IAlredyUsedAttributesInfo alreadyUsedAttributesInfo, 
            int treeDepth,
            bool isFirstSplit = false)
        {
            if (dataFrame.GetColumnVector<object>(dependentFeatureName).DataItems.Distinct().Count() == 1 || MaximalTreeDepthHasBeenReached(additionalParams, treeDepth))
            {
                return BuildLeaf(dataFrame, dependentFeatureName);
            }

            // TODO: later on add additional params indicating which features were already used
            ISplittingResult splitResult = BestSplitSelector.SelectBestSplit(
                dataFrame,
                dependentFeatureName,
                SplitQualityChecker,
                alreadyUsedAttributesInfo);
            if (SplitIsEmpty(splitResult))
            {
                return BuildLeaf(dataFrame, dependentFeatureName);
            }

            if (additionalParams.UsePrunningHeuristicDuringTreeBuild && this.StatisticalSignificanceChecker != null)
            {
                var isSplitSignificant = StatisticalSignificanceChecker.IsSplitStatisticallySignificant(
                    dataFrame,
                    splitResult,
                    dependentFeatureName);
                if (!isSplitSignificant)
                {
                    return BuildLeaf(dataFrame, dependentFeatureName);
                }
            }

            var children = new ConcurrentDictionary<IDecisionTreeLink, IDecisionTreeNode>();
            if (isFirstSplit)
            {
                Parallel.ForEach(
                    splitResult.SplittedDataSets,
                    splitData =>
                    {
                        this.AddChildFromSplit(dependentFeatureName, additionalParams, splitData, children, alreadyUsedAttributesInfo, treeDepth + 1);
                    });
            }
            else
            {
                foreach (var splitData in splitResult.SplittedDataSets)
                {
                    this.AddChildFromSplit(dependentFeatureName, additionalParams, splitData, children, alreadyUsedAttributesInfo, treeDepth + 1);
                }
            }
            return BuildConcreteDecisionTreeNode(splitResult, children);
        }
 //TODO: AAA make it nicer - maybe encapsulate Tuple in some dto
 protected abstract Tuple<IList<ISplittedData>, ISplittingParams, double> EvaluateCategoricalSplit(
     IDataFrame dataToSplit, 
     string dependentFeatureName, 
     string splittingFeatureName, 
     double bestSplitQualitySoFar,
     double initialEntropy,
     ISplitQualityChecker splitQualityChecker,
     IAlredyUsedAttributesInfo alredyUsedAttributesInfo);
        public ISplittingResult SelectBestSplit(
            IDataFrame baseData,
            string dependentFeatureName,
            INumericalSplitQualityChecker splitQualityChecker,
            IAlredyUsedAttributesInfo alreadyUsedAttributesInfo)
        {
            var bestSplitQuality = double.NegativeInfinity;
            var initialEntropy = splitQualityChecker.GetInitialEntropy(baseData, dependentFeatureName);
            Tuple<string, double> bestSplit = null;
            /*
            if (baseData.RowCount <= baseData.ColumnsCount)
            {
                return null;
            }
            */
            var featureColumns = baseData.ColumnNames.Except(new[] { dependentFeatureName });
            foreach (var feature in featureColumns)
            {
                var dataOrderedByFeature =
                    baseData.GetNumericColumnVector(feature)
                        .Select((rowVal, idx) => new Tuple<double, double, int>(rowVal, (double)baseData[idx, dependentFeatureName].FeatureValue, idx))
                        .OrderBy(tpl => tpl.Item1)
                        .ToList();
                var dependentFeatureValuesOrdered = dataOrderedByFeature.Select(elem => elem.Item2).ToList();

                var previousFeatureValue = dataOrderedByFeature.First().Item1;

                for (int i = 0; i < (dataOrderedByFeature.Count -1); i++)
                {
                    var dataPoint = dataOrderedByFeature[i];
                    var currentFeatureValue = dataPoint.Item1;
                    if (currentFeatureValue != previousFeatureValue)
                    {
                        var splitPoint = (currentFeatureValue + previousFeatureValue) / 2.0;
                        if (!alreadyUsedAttributesInfo.WasAttributeAlreadyUsedWithValue(feature, splitPoint))
                        {
                            var dependentValsBelow = dependentFeatureValuesOrdered.Take(i).ToList();
                            var dependentValsAbove = dependentFeatureValuesOrdered.Skip(i).ToList();
                            var splitQuality = splitQualityChecker.CalculateSplitQuality(
                                initialEntropy,
                                baseData.RowCount,
                                new[] { dependentValsBelow, dependentValsAbove });
                            if (splitQuality > bestSplitQuality)
                            {
                                bestSplitQuality = splitQuality;
                                bestSplit = new Tuple<string, double>(feature, splitPoint);
                            }
                        }
                    }

                    previousFeatureValue = currentFeatureValue;
                }
            }

            if (bestSplit == null)
            {
                return null;
            }

            var splittedData = binaryNumericDataSplitter.SplitData(
                baseData,
                new BinarySplittingParams(bestSplit.Item1, bestSplit.Item2, dependentFeatureName));

            return new BinarySplittingResult(true, bestSplit.Item1, splittedData, bestSplit.Item2);
        }
 protected abstract void UpdateAlreadyUsedAttributes(
     ISplittingParams splittingParams,
     IAlredyUsedAttributesInfo alreadyUsedAttributesInfo);
        public ISplittingResult SelectBestSplit(
            IDataFrame baseData,
            string dependentFeatureName,
            INumericalSplitQualityChecker splitQualityChecker,
            IAlredyUsedAttributesInfo alreadyUsedAttributesInfo)
        {
            var bestSplitQuality             = double.NegativeInfinity;
            var initialEntropy               = splitQualityChecker.GetInitialEntropy(baseData, dependentFeatureName);
            Tuple <string, double> bestSplit = null;

            /*
             * if (baseData.RowCount <= baseData.ColumnsCount)
             * {
             *  return null;
             * }
             */
            var featureColumns = baseData.ColumnNames.Except(new[] { dependentFeatureName });

            foreach (var feature in featureColumns)
            {
                var dataOrderedByFeature =
                    baseData.GetNumericColumnVector(feature)
                    .Select((rowVal, idx) => new Tuple <double, double, int>(rowVal, (double)baseData[idx, dependentFeatureName].FeatureValue, idx))
                    .OrderBy(tpl => tpl.Item1)
                    .ToList();
                var dependentFeatureValuesOrdered = dataOrderedByFeature.Select(elem => elem.Item2).ToList();

                var previousFeatureValue = dataOrderedByFeature.First().Item1;

                for (int i = 0; i < (dataOrderedByFeature.Count - 1); i++)
                {
                    var dataPoint           = dataOrderedByFeature[i];
                    var currentFeatureValue = dataPoint.Item1;
                    if (currentFeatureValue != previousFeatureValue)
                    {
                        var splitPoint = (currentFeatureValue + previousFeatureValue) / 2.0;
                        if (!alreadyUsedAttributesInfo.WasAttributeAlreadyUsedWithValue(feature, splitPoint))
                        {
                            var dependentValsBelow = dependentFeatureValuesOrdered.Take(i).ToList();
                            var dependentValsAbove = dependentFeatureValuesOrdered.Skip(i).ToList();
                            var splitQuality       = splitQualityChecker.CalculateSplitQuality(
                                initialEntropy,
                                baseData.RowCount,
                                new[] { dependentValsBelow, dependentValsAbove });
                            if (splitQuality > bestSplitQuality)
                            {
                                bestSplitQuality = splitQuality;
                                bestSplit        = new Tuple <string, double>(feature, splitPoint);
                            }
                        }
                    }

                    previousFeatureValue = currentFeatureValue;
                }
            }

            if (bestSplit == null)
            {
                return(null);
            }

            var splittedData = binaryNumericDataSplitter.SplitData(
                baseData,
                new BinarySplittingParams(bestSplit.Item1, bestSplit.Item2, dependentFeatureName));

            return(new BinarySplittingResult(true, bestSplit.Item1, splittedData, bestSplit.Item2));
        }
 protected virtual void AddChildFromSplit(
     string dependentFeatureName, 
     IDecisionTreeModelBuilderParams additionalParams, 
     ISplittedData splitData, 
     ConcurrentDictionary<IDecisionTreeLink, IDecisionTreeNode> children, 
     IAlredyUsedAttributesInfo alreadyUsedAttributesInfo,
     int treeDepth)
 {
     var decisionTreeNode = BuildDecisionNode(
         splitData.SplittedDataFrame,
         dependentFeatureName,
         additionalParams,
         alreadyUsedAttributesInfo,
         treeDepth);
     var link = splitData.SplitLink;
     children.TryAdd(link, decisionTreeNode);
 }