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Random forest

RANDV​

randv(Integer dim, Integer len) -> Vector of Integer
STABLE

No description.

RF:CLASSIFY​

rf:classify(Bag of Decisiontree rf, Vector of Number v) -> Vector
STABLE

The predicted class belonging of v by the random forest rf. 

    The resulting integer is the class index with the highest probability.
    In the case of a tie, the lowest index is given.

RF:DECISIONTREE​

rf:decisiontree(Record r) -> Decisiontree
STABLE

Convert a decision tree specified on record format 

    to sa.engine internal representation.

RF:DT_CLASSIFY​

rf:dt_classify(Decisiontree dt, Vector v) -> Integer
STABLE

Use the Decisiontree dt to predict class belonging of v. 

    The resulting integer is the class index with the highest probability.
    In the case of a tie, the lowest index is given.

RF:DT_PREDICT​

rf:dt_predict(Decisiontree dt, Vector v) -> Vector
STABLE

Use the Decisiontree dt to predict class belonging of v. 

    The resulting vector is the count of each class.

RF:DT_PROBABILITY​

rf:dt_probability(Decisiontree dt, Vector v) -> Vector of Number
STABLE

Use the Decisiontree d to predict class belonging of v. 

    The resulting vector `c` is the probability vector
    where `c[i]` is the probability that that `v` belongs to class `i`.

RF:GENERATE_CASE_FUNCTION​

rf:generate_case_function(Charstring functionname, Charstring forestname, Charstring tree_name) -> Function
STABLE

No description.

RF:GINI_IMPURITY​

rf:gini_impurity(Bag bo) -> Real
STABLE

No description.

RF:GROW_TREES​

rf:grow_trees(Bag of (Integer, Vector of Number, Integer), Integer numtrees, Integer samples_per_tree, Vector of Integer split_features) -> Decisiontree
STABLE

No description.

RF:IMPORT_FOREST_INTO​

rf:import_forest_into(Charstring dir, Charstring forestname)
STABLE

Import a set of tree files in directory dir into a Random Forest 

  named `forestname`. The imported trees are then available in the
  `random_forest(Charstring forestname, Charstring treename)` table.

RF:PROBABILITIES​

rf:probabilities(Bag of Decisiontree rf, Vector of Number v) -> Vector of Number
STABLE

The collection of probability vectors of class belongings 

    from all decision trees in `rf` for `v`.

RF:PROBABILITY​

rf:probability(Bag of Decisiontree rf, Vector of Number v) -> Vector of Number
STABLE

The average probability vector of class belongings 

    from all decision trees in `rf` for `v`.

RF:RANDOM_FOREST​

rf:random_forest(Charstring forestname) -> Bag of Decisiontree
STABLE

Helper function to obtain all trees in a forest forestname

RF:RANDOM_FOREST_TREE​

rf:random_forest_tree(Charstring forestname, Charstring treename) -> Decisiontree
STABLE

The global table containing random forests. 

    Each forest has a name `forestname`
    Each tree in the forest has a name `treename`

RF:RANDOM_SUBSET​

rf:random_subset(Bag of (Integer, Vector of Number, Integer), Integer num)->(Integer id, Vector of Number v, Integer c)
STABLE

No description.

RF:RECORD​

rf:record(Decisiontree dt) -> Record
STABLE

Convert a decision tree to record.