ai.libs.jaicore.ml.tsc.classifier.trees

Class TimeSeriesTreeClassifier

java.lang.Object

ai.libs.jaicore.ml.tsc.classifier.ASimplifiedTSClassifier<java.lang.Integer>

ai.libs.jaicore.ml.tsc.classifier.trees.TimeSeriesTreeClassifier

public class TimeSeriesTreeClassifier
extends ASimplifiedTSClassifier<java.lang.Integer>

Time series tree as described in Deng, Houtao et al. "A Time Series Forest for Classification and Feature Extraction." Inf. Sci. 239 (2013): 142-153. This classifier only supports univariate time series prediction.

Field Summary

Fields inherited from class ai.libs.jaicore.ml.tsc.classifier.ASimplifiedTSClassifier

classMapper, trained

Constructor Summary

Constructors

Constructor and Description
TimeSeriesTreeClassifier(TimeSeriesTreeLearningAlgorithm.ITimeSeriesTreeConfig config) Constructs an empty time series tree.

Method Summary

Modifier and Type	Method and Description
static ai.libs.jaicore.graph.TreeNode<ai.libs.jaicore.ml.tsc.classifier.trees.TimeSeriesTreeClassifier.TimeSeriesTreeNodeDecisionFunction>	decide(ai.libs.jaicore.graph.TreeNode<ai.libs.jaicore.ml.tsc.classifier.trees.TimeSeriesTreeClassifier.TimeSeriesTreeNodeDecisionFunction> treeNode, double[] instance) Function performing the decision on a treeNode given the instance based on the locally stored splitting criterion.
TimeSeriesTreeLearningAlgorithm	getLearningAlgorithm(TimeSeriesDataset dataset)
ai.libs.jaicore.graph.TreeNode<ai.libs.jaicore.ml.tsc.classifier.trees.TimeSeriesTreeClassifier.TimeSeriesTreeNodeDecisionFunction>	getRootNode() Getter for the root node.
java.lang.Integer	predict(double[] univInstance) Predicts the class of the given univariate instance by iterating through the tree starting from the root node to a leaf node to induce a class prediction.
java.lang.Integer	predict(java.util.List<double[]> multivInstance) Performs a prediction based on the given multivariate list of double[] instance representation and returns the result.
java.util.List<java.lang.Integer>	predict(TimeSeriesDataset dataset) Performs predictions based on the given instances in the given dataset.

Methods inherited from class ai.libs.jaicore.ml.tsc.classifier.ASimplifiedTSClassifier

checkWhetherPredictionIsPossible, getClassMapper, isTrained, setClassMapper, train

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TimeSeriesTreeClassifier

public TimeSeriesTreeClassifier(TimeSeriesTreeLearningAlgorithm.ITimeSeriesTreeConfig config)

Constructs an empty time series tree.

Method Detail

getRootNode

public ai.libs.jaicore.graph.TreeNode<ai.libs.jaicore.ml.tsc.classifier.trees.TimeSeriesTreeClassifier.TimeSeriesTreeNodeDecisionFunction> getRootNode()

Getter for the root node.

Returns:

Returns the root node of the time series tree

predict

public java.lang.Integer predict(double[] univInstance)
                          throws PredictionException

Predicts the class of the given univariate instance by iterating through the tree starting from the root node to a leaf node to induce a class prediction.

Specified by:

predict in class ASimplifiedTSClassifier<java.lang.Integer>

Parameters:

univInstance - Univariate instance to be predicted

Returns:

Returns the result of the prediction

Throws:

PredictionException - If something fails during the prediction process.

predict

public java.lang.Integer predict(java.util.List<double[]> multivInstance)
                          throws PredictionException

Performs a prediction based on the given multivariate list of double[] instance representation and returns the result.

Overrides:

predict in class ASimplifiedTSClassifier<java.lang.Integer>

Parameters:

multivInstance - Multivariate instance given by a list of multiple double[] time series used for the prediction

Returns:

Returns the result of the prediction

Throws:

PredictionException - If something fails during the prediction process.

predict

public java.util.List<java.lang.Integer> predict(TimeSeriesDataset dataset)
                                          throws PredictionException

Performs predictions based on the given instances in the given dataset.

Specified by:

predict in class ASimplifiedTSClassifier<java.lang.Integer>

Parameters:

dataset - The TimeSeriesDataset for which predictions should be made.

Returns:

Returns the result of the predictions

Throws:

PredictionException - If something fails during the prediction process

decide

public static ai.libs.jaicore.graph.TreeNode<ai.libs.jaicore.ml.tsc.classifier.trees.TimeSeriesTreeClassifier.TimeSeriesTreeNodeDecisionFunction> decide(ai.libs.jaicore.graph.TreeNode<ai.libs.jaicore.ml.tsc.classifier.trees.TimeSeriesTreeClassifier.TimeSeriesTreeNodeDecisionFunction> treeNode,
                                                                                                                                                         double[] instance)

Function performing the decision on a treeNode given the instance based on the locally stored splitting criterion.

Parameters:

treeNode - Tree node where the decision is taken place

instance - Instance values

Returns:

Returns the child node where the next decision can be done, null if treeNode is a tree node

getLearningAlgorithm

public TimeSeriesTreeLearningAlgorithm getLearningAlgorithm(TimeSeriesDataset dataset)

Specified by:

getLearningAlgorithm in class ASimplifiedTSClassifier<java.lang.Integer>