Beispiel #1
0
 /// <summary>
 /// Initializes a new instance of the DecisionTreeClassifier class.
 /// </summary>
 /// <param name="criterion">The function to measure the quality of a split. Supported criteria are
 /// <see cref="Criterion.Gini"/> for the Gini impurity and <see cref="Criterion.Entropy"/>
 /// for the information gain.</param>
 /// <param name="splitter">The strategy used to choose the split at each node. Supported
 /// strategies are <see cref="Splitter.Best"/> to choose the best split and <see cref="Splitter.Random"/> to choose
 /// the best random split.</param>
 /// <param name="maxDepth">The maximum depth of the tree. If <c>null</c>, then nodes are expanded until
 /// all leaves are pure or until all leaves contain less than
 /// <paramref name="minSamplesSplit"/> samples.</param>
 /// <param name="minSamplesSplit">The minimum number of samples required to split an internal node.</param>
 /// <param name="minSamplesLeaf">The minimum number of samples required to be at a leaf node.</param>
 /// <param name="maxFeatures">Number of features to consider when looking for the best split. If null -
 /// then all features will be considered.</param>
 /// <param name="random">random number generator</param>
 public DecisionTreeClassifier(
     Criterion criterion           = Criterion.Gini,
     Splitter splitter             = Splitter.Best,
     int?maxDepth                  = null,
     int minSamplesSplit           = 2,
     int minSamplesLeaf            = 1,
     MaxFeaturesChoice maxFeatures = null,
     Random random                 = null)
     : base(criterion, splitter, maxDepth, minSamplesSplit, minSamplesLeaf, maxFeatures, random)
 {
 }
 /// <summary>
 /// Initializes a new instance of the ExtraTreeRegressor class.
 /// </summary>
 /// <param name="criterion"> The function to measure the quality of a split. The only supported
 /// criterion is <see cref="Criterion.Mse"/> for the mean squared error.</param>
 /// <param name="splitter">The strategy used to choose the split at each node. Supported
 /// strategies are <see cref="Splitter.Best"/> to choose the best split and <see cref="Splitter.Random"/> to choose
 /// the best random split.</param>
 /// <param name="maxDepth">The maximum depth of the tree. If <c>null</c>, then nodes are expanded until
 /// all leaves are pure or until all leaves contain less than
 /// <paramref name="minSamplesSplit"/> samples.</param>
 /// <param name="minSamplesSplit">The minimum number of samples required to split an internal node.</param>
 /// <param name="minSamplesLeaf">The minimum number of samples required to be at a leaf node.</param>
 /// <param name="maxFeatures">Number of features to consider when looking for the best split. If null -
 /// then all features will be considered.</param>
 /// <param name="random">random number generator</param>
 public ExtraTreeRegressor(
     Criterion criterion           = Criterion.Mse,
     Splitter splitter             = Splitter.Random,
     int?maxDepth                  = null,
     int minSamplesSplit           = 2,
     int minSamplesLeaf            = 1,
     MaxFeaturesChoice maxFeatures = null,
     Random random                 = null) : base(criterion,
                                                  splitter,
                                                  maxDepth,
                                                  minSamplesSplit,
                                                  minSamplesLeaf,
                                                  maxFeatures ?? MaxFeaturesChoice.Auto(),
                                                  random)
 {
 }
 /// <remarks>
 /// https://github.com/scikit-learn/scikit-learn/tree/30eb78de8d1e7b25fb1a4b0d8c63afdcc972ee84/sklearn/tree/tree.py
 /// </remarks>
 public ExtraTreeClassifier(
     Criterion criterion            = Criterion.Gini,
     Splitter splitter              = Splitter.Random,
     int?max_depth                  = null,
     int min_samples_split          = 2,
     int min_samples_leaf           = 1,
     MaxFeaturesChoice max_features = null,
     Random random_state            = null) :
     base(criterion,
          splitter,
          max_depth,
          min_samples_split,
          min_samples_leaf,
          max_features ?? MaxFeaturesChoice.Auto(),
          random_state)
 {
 }
Beispiel #4
0
 /// <summary>
 /// Initializes a new instance of the BaseDecisionTree class.
 /// </summary>
 /// <param name="criterion">The function to measure the quality of a split.</param>
 /// <param name="splitter">The strategy used to choose the split at each node.</param>
 /// <param name="maxDepth">
 /// The maximum depth of the tree. If <c>null</c>, then nodes are expanded until
 /// all leaves are pure or until all leaves contain less than
 /// <paramref name="minSamplesSplit"/> samples.</param>
 /// <param name="minSamplesSplit">The minimum number of samples required to split an internal node.</param>
 /// <param name="minSamplesLeaf">The minimum number of samples required to be at a leaf node.</param>
 /// <param name="maxFeatures">Number of features to consider when looking for the best split. If null -
 /// then all features will be considered.</param>
 /// <param name="randomState">random number generator</param>
 public BaseDecisionTree(
     Criterion criterion,
     Splitter splitter,
     int?maxDepth,
     int minSamplesSplit,
     int minSamplesLeaf,
     MaxFeaturesChoice maxFeatures,
     Random randomState)
 {
     this.criterion       = criterion;
     this.splitter        = splitter;
     this.maxDepth        = maxDepth;
     this.minSamplesSplit = minSamplesSplit;
     this.minSamplesLeaf  = minSamplesLeaf;
     this.maxFeatures     = maxFeatures;
     this.randomState     = randomState ?? new Random();
 }