GenericItemSimilarity Class

NReco.Recommender Class Library

A "generic" IItemSimilarity which takes a static list of precomputed item similarities and bases its responses on that alone. The values may have been precomputed offline by another process, stored in a file, and then read and fed into an instance of this class.

Inheritance Hierarchy

System.Object
NReco.CF.Taste.Impl.Similarity.GenericItemSimilarity

Namespace: NReco.CF.Taste.Impl.Similarity
Assembly: NReco.Recommender (in NReco.Recommender.dll) Version: 1.0.0.0 (1.0.0.0)

Syntax

C++

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public sealed class GenericItemSimilarity : IItemSimilarity, 
	IRefreshable

public sealed class GenericItemSimilarity : IItemSimilarity, 
	IRefreshable

Public NotInheritable Class GenericItemSimilarity 
	Implements IItemSimilarity, IRefreshable

Public NotInheritable Class GenericItemSimilarity 
	Implements IItemSimilarity, IRefreshable

public ref class GenericItemSimilarity sealed : IItemSimilarity, 
	IRefreshable

public ref class GenericItemSimilarity sealed : IItemSimilarity, 
	IRefreshable

[<SealedAttribute>]
type GenericItemSimilarity =  
    class 
        interface IItemSimilarity 
        interface IRefreshable 
    end

[<SealedAttribute>]
type GenericItemSimilarity =  
    class 
        interface IItemSimilarity 
        interface IRefreshable 
    end

The GenericItemSimilarity type exposes the following members.

Constructors

	Name	Description
	GenericItemSimilarity(IEnumerable<GenericItemSimilarity.ItemItemSimilarity>)	Initializes a new instance of the GenericItemSimilarity class
	GenericItemSimilarity(IEnumerable<GenericItemSimilarity.ItemItemSimilarity>, Int32)	Initializes a new instance of the GenericItemSimilarity class
	GenericItemSimilarity(IItemSimilarity, IDataModel)	Initializes a new instance of the GenericItemSimilarity class
	GenericItemSimilarity(IItemSimilarity, IDataModel, Int32)	Initializes a new instance of the GenericItemSimilarity class

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Methods

	Name	Description
	AllSimilarItemIDs
	Equals	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	ItemSimilarities
	ItemSimilarity
	Refresh
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Remarks

This is perhaps the best IItemSimilarity to use with GenericItemBasedRecommender, for now, since the point of item-based recommenders is that they can take advantage of the fact that item similarity is relatively static, can be precomputed, and then used in computation to gain a significant performance advantage.