BestForestSplit         Choosing the best variable for splitting.
ClassMode               Determining the mode from a vector of numbers.
SoftClassForest         Implementing a Random Forest of SDTs.
SoftClassMatrix         Converting response vector to sparse matrix.
SoftForestPredDepth1    Building a single level for the Random Forest
                        of SDTs.
SoftForestPredFeeder    Choosing the appropriate depth function.
SoftObservation         Recording the prediction weights to analyze
                        observation-level patterns
