CategoricalEntailment Class

public class CategoricalEntailment

Public Class CategoricalEntailment

public ref class CategoricalEntailment

type CategoricalEntailment = class end

Inheritance

Object    CategoricalEntailment

A CategoricalEntailment instance represents a relationship between a set of FeatureVariables and a corresponding ResponseVariable.

The relationship has the form of an implication from a collection of FeaturePremises, statements about the available features, to a corresponding ResponseConclusion, a category Code in the ResponseVariable.

The conclusion is entailed by the premises with a degree of confirmation represented by the TruthValue of the instance.

Let us assume that items from a given feature space must be classified into a set of labels. If feature variables are taken into account, and if variable has finite domain , then can be represented as the Cartesian product . A categorical entailment is a triple , where is a subset of representing the FeaturePremises, is the ResponseConclusion, and is the TruthValue.

Given a CategoricalDataSet instance in which observations of the FeatureVariables are included, you can check for what of its rows the premises are satisfied by calling method ValidatePremises(CategoricalDataSet, IndexCollection).

Empty feature or response domains are not allowed.

A premise can be empty, but in such case it is represented as matching the corresponding feature domain. Equivalently, a premise which is not a nonempty proper subset of the domain is always valid for every item in the feature space.

You can't directly instantiate a CategoricalEntailment object. However, categorical entailments can be exploited for classification purposes via CategoricalEntailmentEnsembleClassifier instances. Entailments can be included in such a classifier by calling its method Add(IListSortedSetDouble, Double, Double). They can be populated automatically by executing methods AddTrained(CategoricalDataSet, IndexCollection, Int32, Int32, Boolean, Boolean) or Train(CategoricalDataSet, IndexCollection, Int32, Int32, Boolean, Boolean).

Reference