MyMediaLite
3.02
|
Data structure for implicit, positive-only user feedback. More...
Public Member Functions | |
void | Add (int user_id, int item_id) |
Add a user-item event to the data structure. | |
int | GetIndex (int user_id, int item_id) |
Get index for a given user and item. | |
int | GetIndex (int user_id, int item_id, ICollection< int > indexes) |
Get index for given user and item. | |
IBooleanMatrix | GetItemMatrixCopy () |
Get a copy of the item matrix. | |
ISet< int > | GetItems (IList< int > indices) |
Get all items that are referenced by a given list of indices. | |
virtual void | GetObjectData (SerializationInfo info, StreamingContext context) |
IBooleanMatrix | GetUserMatrixCopy () |
Get a copy of the user matrix. | |
ISet< int > | GetUsers (IList< int > indices) |
Get all users that are referenced by a given list of indices. | |
PosOnlyFeedback () | |
Default constructor. | |
PosOnlyFeedback (IDataSet dataset) | |
PosOnlyFeedback (SerializationInfo info, StreamingContext context) | |
void | Remove (int user_id, int item_id) |
Remove a user-item event from the data structure. | |
void | Remove (int index) |
Remove the event with a given index. | |
override void | RemoveItem (int item_id) |
Remove all feedback about a given item. | |
override void | RemoveUser (int user_id) |
Remove all feedback by a given user. | |
IPosOnlyFeedback | Transpose () |
Get the transpose of the dataset (users and items exchanged) | |
bool | TryGetIndex (int user_id, int item_id, out int index) |
Try to get the index for given user and item. | |
bool | TryGetIndex (int user_id, int item_id, ICollection< int > indexes, out int index) |
Try to get the index for given user and item. | |
Protected Attributes | |
IList< IList< int > > | by_item |
Indices organized by item. | |
IList< IList< int > > | by_user |
Indices organized by user. | |
IList< int > | count_by_item |
field for storing the count per item | |
IList< int > | count_by_user |
field for storing the count per user | |
Properties | |
IList< int > | AllItems [get] |
all item IDs in the dataset | |
IList< int > | AllUsers [get] |
all user IDs in the dataset | |
IList< IList< int > > | ByItem [get] |
indices by item | |
IList< IList< int > > | ByUser [get] |
indices by user | |
virtual int | Count [get] |
the number of interaction events in the dataset | |
IList< int > | CountByItem [get] |
count by item | |
IList< int > | CountByUser [get] |
count by user | |
IBooleanMatrix | ItemMatrix [get] |
By-item access, items are stored in the rows, users in the columns. | |
IList< int > | Items [get, set] |
the item entries | |
int | MaxItemID [get, set] |
the maximum item ID in the dataset | |
int | MaxUserID [get, set] |
the maximum user ID in the dataset | |
IList< int > | RandomIndex [get] |
get a randomly ordered list of all indices | |
IBooleanMatrix | UserMatrix [get] |
By-user access, users are stored in the rows, items in the columns. | |
IList< int > | Users [get, set] |
the user entries |
Data structure for implicit, positive-only user feedback.
This data structure supports incremental updates if supported by the type parameter T.
T | : | IBooleanMatrix | |
T | : | new() |
void Add | ( | int | user_id, |
int | item_id | ||
) | [inline] |
Add a user-item event to the data structure.
user_id | the user ID |
item_id | the item ID |
Implements IPosOnlyFeedback.
int GetIndex | ( | int | user_id, |
int | item_id | ||
) | [inline, inherited] |
Get index for a given user and item.
user_id | the user ID |
item_id | the item ID |
Implements IDataSet.
int GetIndex | ( | int | user_id, |
int | item_id, | ||
ICollection< int > | indexes | ||
) | [inline, inherited] |
Get index for given user and item.
user_id | the user ID |
item_id | the item ID |
indexes | the indexes to look at |
Implements IDataSet.
IBooleanMatrix GetItemMatrixCopy | ( | ) | [inline] |
ISet<int> GetItems | ( | IList< int > | indices | ) | [inline, inherited] |
Get all items that are referenced by a given list of indices.
indices | the indices to take into account |
Implements IDataSet.
IBooleanMatrix GetUserMatrixCopy | ( | ) | [inline] |
ISet<int> GetUsers | ( | IList< int > | indices | ) | [inline, inherited] |
Get all users that are referenced by a given list of indices.
indices | the indices to take into account |
Implements IDataSet.
PosOnlyFeedback | ( | ) | [inline] |
Default constructor.
void Remove | ( | int | user_id, |
int | item_id | ||
) | [inline] |
Remove a user-item event from the data structure.
If no event for the given user-item combination exists, nothing happens.
user_id | the user ID |
item_id | the item ID |
Implements IPosOnlyFeedback.
void Remove | ( | int | index | ) | [inline] |
Remove the event with a given index.
index | the index of the event to be removed |
override void RemoveItem | ( | int | item_id | ) | [inline, virtual] |
override void RemoveUser | ( | int | user_id | ) | [inline, virtual] |
IPosOnlyFeedback Transpose | ( | ) | [inline] |
Get the transpose of the dataset (users and items exchanged)
Implements IPosOnlyFeedback.
bool TryGetIndex | ( | int | user_id, |
int | item_id, | ||
out int | index | ||
) | [inline, inherited] |
Try to get the index for given user and item.
user_id | the user ID |
item_id | the item ID |
index | will contain the index of the first event encountered that matches the user ID and item ID |
Implements IDataSet.
bool TryGetIndex | ( | int | user_id, |
int | item_id, | ||
ICollection< int > | indexes, | ||
out int | index | ||
) | [inline, inherited] |
Try to get the index for given user and item.
user_id | the user ID |
item_id | the item ID |
indexes | the indexes to look at |
index | will contain the index of the first event encountered that matches the user ID and item ID |
Implements IDataSet.
IList<IList<int> > by_item [protected, inherited] |
Indices organized by item.
IList<IList<int> > by_user [protected, inherited] |
Indices organized by user.
IList<int> count_by_item [protected, inherited] |
field for storing the count per item
IList<int> count_by_user [protected, inherited] |
field for storing the count per user
IList<IList<int> > ByItem [get, inherited] |
IList<IList<int> > ByUser [get, inherited] |
virtual int Count [get, inherited] |
the number of interaction events in the dataset
Implements IDataSet.
Reimplemented in StaticRatings.
IList<int> CountByItem [get, inherited] |
IList<int> CountByUser [get, inherited] |
IBooleanMatrix ItemMatrix [get] |
By-item access, items are stored in the rows, users in the columns.
Implements IPosOnlyFeedback.
IList<int> RandomIndex [get, inherited] |
get a randomly ordered list of all indices
Should be implemented as a lazy data structure
Implements IDataSet.
IBooleanMatrix UserMatrix [get] |
By-user access, users are stored in the rows, items in the columns.
Implements IPosOnlyFeedback.