/**
* Launches a deep sort on the array of feature vectors. This is public because it can be used to
* re-index the previously read feature file.
*
* @param featureIdx An array of feature names, indicating the sequence of features according to
* which the sorting should be performed.
*/
public void deepSort(String[] setFeatureSequence) {
featureSequence = featureDefinition.getFeatureIndexArray(setFeatureSequence);
numberOfLeaves = 0;
tree = new MaryNode(0, featureVectors.length);
sortNode(0, tree);
}
