MyMediaLite
3.11
|
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 More... | |
int | GetIndex (int user_id, int item_id) |
Get index for a given user and item More... | |
int | GetIndex (int user_id, int item_id, ICollection< int > indexes) |
Get index for given user and item More... | |
IBooleanMatrix | GetItemMatrixCopy () |
Get a copy of the item matrix More... | |
ISet< int > | GetItems (IList< int > indices) |
Get all items that are referenced by a given list of indices More... | |
virtual void | GetObjectData (SerializationInfo info, StreamingContext context) |
IBooleanMatrix | GetUserMatrixCopy () |
Get a copy of the user matrix More... | |
ISet< int > | GetUsers (IList< int > indices) |
Get all users that are referenced by a given list of indices More... | |
PosOnlyFeedback () | |
Default constructor More... | |
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 More... | |
void | Remove (int index) |
Remove the event with a given index More... | |
override void | RemoveItem (int item_id) |
Remove all feedback about a given item More... | |
override void | RemoveUser (int user_id) |
Remove all feedback by a given user More... | |
IPosOnlyFeedback | Transpose () |
Get the transpose of the dataset (users and items exchanged) More... | |
bool | TryGetIndex (int user_id, int item_id, out int index) |
Try to get the index for given user and item More... | |
bool | TryGetIndex (int user_id, int item_id, ICollection< int > indexes, out int index) |
Try to get the index for given user and item More... | |
Protected Attributes | |
IList< IList< int > > | by_item |
Indices organized by item More... | |
IList< IList< int > > | by_user |
Indices organized by user More... | |
IList< int > | count_by_item |
field for storing the count per item More... | |
IList< int > | count_by_user |
field for storing the count per user More... | |
Properties | |
IList< int > | AllItems [get] |
IList< int > | AllUsers [get] |
IList< IList< int > > | ByItem [get] |
IList< IList< int > > | ByUser [get] |
virtual int | Count [get] |
IList< int > | CountByItem [get] |
IList< int > | CountByUser [get] |
IBooleanMatrix | ItemMatrix [get] |
By-item access, items are stored in the rows, users in the columns More... | |
IList< int > | Items [get, protected set] |
int | MaxItemID [get, protected set] |
int | MaxUserID [get, protected set] |
IList< int > | RandomIndex [get] |
IBooleanMatrix | UserMatrix [get] |
By-user access, users are stored in the rows, items in the columns More... | |
IList< int > | Users [get, protected set] |
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() |
|
inline |
Default constructor
|
inline |
Add a user-item event to the data structure
user_id | the user ID |
item_id | the item ID |
Implements IPosOnlyFeedback.
|
inlineinherited |
Get index for a given user and item
user_id | the user ID |
item_id | the item ID |
Implements IDataSet.
|
inlineinherited |
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.
|
inline |
|
inlineinherited |
Get all items that are referenced by a given list of indices
indices | the indices to take into account |
Implements IDataSet.
|
inline |
|
inlineinherited |
Get all users that are referenced by a given list of indices
indices | the indices to take into account |
Implements IDataSet.
|
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.
|
inline |
Remove the event with a given index
index | the index of the event to be removed |
|
inlinevirtual |
|
inlinevirtual |
|
inline |
Get the transpose of the dataset (users and items exchanged)
Implements IPosOnlyFeedback.
|
inlineinherited |
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.
|
inlineinherited |
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.
|
protectedinherited |
Indices organized by item
|
protectedinherited |
Indices organized by user
|
protectedinherited |
field for storing the count per item
|
protectedinherited |
field for storing the count per user
|
get |
By-item access, items are stored in the rows, users in the columns
|
get |
By-user access, users are stored in the rows, items in the columns