SequentialDiversification Class Reference

Sequential diversification More...

Public Member Functions
IList< int >	DiversifySequential (IList< int > item_list, float diversification_parameter)
	Diversify an item list More...
	SequentialDiversification (SymmetricCorrelationMatrix item_correlation)
	Constructor More...

Static Public Member Functions
static float	Similarity (int item_id, ICollection< int > items, SymmetricCorrelationMatrix item_correlation)
	Compute similarity between one item and a collection of items More...
static float	Similarity (ICollection< int > items, SymmetricCorrelationMatrix item_correlation)
	Compute the intra-set similarity of an item collection More...

Detailed Description

Sequential diversification

Literature:

• Cai-Nicolas Ziegler, Sean McNee, Joseph A. Konstan, Georg Lausen: Improving Recommendation Lists Through Topic Diversification. WWW 2005

Constructor & Destructor Documentation

SequentialDiversification ( SymmetricCorrelationMatrix  item_correlation )

inline

Constructor

Parameters

item_correlation

the similarity measure to use for diversification

Member Function Documentation

IList<int> DiversifySequential ( IList< int >  item_list, float  diversification_parameter  )

inline

Diversify an item list

Parameters

item_list	a list of items
diversification_parameter	the diversification parameter (higher means more diverse)

Returns

a list re-ordered to ensure maximum diversity at the top of the list

static float Similarity ( int  item_id, ICollection< int >  items, SymmetricCorrelationMatrix  item_correlation  )

inlinestatic

Compute similarity between one item and a collection of items

Parameters

item_id	the item ID
items	a collection of items
item_correlation	the similarity measure to use

Returns

the similarity between the item and the collection

static float Similarity ( ICollection< int >  items, SymmetricCorrelationMatrix  item_correlation  )

inlinestatic

Compute the intra-set similarity of an item collection

Parameters

items	a collection of items
item_correlation	the similarity measure to use

Returns

the intra-set similarity of the collection

---

The documentation for this class was generated from the following file:

• SequentialDiversification.cs