PosOnlyFeedback< T > Class Template Reference

Data structure for implicit, positive-only user feedback. More...

Inheritance diagram for PosOnlyFeedback< T >:

List of all members.

Public Member Functions
void	Add (int user_id, int item_id)
	Add a user-item event to the data structure.
int	Overlap (IPosOnlyFeedback s)
	Compute the number of overlapping events in two feedback datasets.
	PosOnlyFeedback (T user_matrix)
	Create a PosOnlyFeedback object from an existing user-item matrix.
	PosOnlyFeedback ()
	Default constructor.
void	Remove (int user_id, int item_id)
	Remove a user-item event from the data structure.
void	RemoveItem (int item_id)
	Remove all feedback about a given item.
void	RemoveUser (int user_id)
	Remove all feedback by a given user.
Properties
ICollection< int >	AllItems [get]
	all items mentioned at least once
ICollection< int >	AllUsers [get]
	all users that have given feedback
int	Count [get]
	the number of feedback events
IBooleanMatrix	ItemMatrix [get]
	By-item access, items are stored in the rows, users in the culumns.
int	MaxItemID [get, set]
	the maximum item ID
int	MaxUserID [get, set]
	the maximum user ID
IBooleanMatrix	UserMatrix [get, set]
	By-user access, users are stored in the rows, items in the culumns.

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Detailed Description

template<T>
class MyMediaLite::Data::PosOnlyFeedback< T >

Data structure for implicit, positive-only user feedback.

This data structure supports incremental updates if supported by T.

Type Constraints

T	:	IBooleanMatrix
T	:	new()

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Constructor & Destructor Documentation

PosOnlyFeedback

(

)

Default constructor.

PosOnlyFeedback

(

T

user_matrix

)

Create a PosOnlyFeedback object from an existing user-item matrix.

Parameters:

user_matrix

the user-item matrix

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Member Function Documentation

void Add	(	int	user_id,
		int	item_id
	)

Add a user-item event to the data structure.

Parameters:

	user_id	the user ID
	item_id	the item ID

Implements IPosOnlyFeedback.

int Overlap

(

IPosOnlyFeedback< T >

s

)

Compute the number of overlapping events in two feedback datasets.

Parameters:

s

the feedback dataset to compare to

Returns:

the number of overlapping events, i.e. events that have the same user and item ID

Implements IPosOnlyFeedback.

void Remove	(	int	user_id,
		int	item_id
	)

Remove a user-item event from the data structure.

Parameters:

	user_id	the user ID
	item_id	the item ID

Implements IPosOnlyFeedback.

void RemoveItem

(

int

item_id

)

Remove all feedback about a given item.

Parameters:

item_id

the item ID

Implements IPosOnlyFeedback.

void RemoveUser

(

int

user_id

)

Remove all feedback by a given user.

Parameters:

user_id

the user id

Implements IPosOnlyFeedback.

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Property Documentation

ICollection<int> AllItems [get]

all items mentioned at least once

Implements IPosOnlyFeedback.

ICollection<int> AllUsers [get]

all users that have given feedback

Implements IPosOnlyFeedback.

int Count [get]

the number of feedback events

Implements IPosOnlyFeedback.

IBooleanMatrix ItemMatrix [get]

By-item access, items are stored in the rows, users in the culumns.

Implements IPosOnlyFeedback.

int MaxItemID [get, set]

the maximum item ID

Implements IPosOnlyFeedback.

int MaxUserID [get, set]

the maximum user ID

Implements IPosOnlyFeedback.

IBooleanMatrix UserMatrix [get, set]

By-user access, users are stored in the rows, items in the culumns.

Implements IPosOnlyFeedback.

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

• PosOnlyFeedback.cs