MyMediaLite
3.03
|
Interface for rating datasets. More...
Public Member Functions | |
void | Add (int user_id, int item_id, byte rating) |
Add byte-valued rating to the collection. | |
void | Add (int user_id, int item_id, float rating) |
Add float-valued rating to the collection. | |
float | Get (int user_id, int item_id, ICollection< int > indexes) |
Directly access rating by user and item. | |
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. | |
ISet< int > | GetItems (IList< int > indices) |
Get all items that are referenced by a given list of indices. | |
ISet< int > | GetUsers (IList< int > indices) |
Get all users that are referenced by a given list of indices. | |
void | InitScale () |
Initialize the Scale property. | |
void | RemoveItem (int item_id) |
Remove all events related to a given item. | |
void | RemoveUser (int user_id) |
Remove all events related to a given user. | |
bool | TryGet (int user_id, int item_id, out float rating) |
Try to retrieve a rating for a given user-item combination. | |
bool | TryGet (int user_id, int item_id, ICollection< int > indexes, out float rating) |
Try to retrieve a rating for a given user-item combination. | |
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. | |
Properties | |
IList< int > | AllItems [get] |
all item IDs in the dataset | |
IList< int > | AllUsers [get] |
all user IDs in the dataset | |
float | Average [get] |
average rating in the dataset | |
IList< IList< int > > | ByItem [get] |
indices by item | |
IList< IList< int > > | ByUser [get] |
indices by user | |
new 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 | |
IList< int > | Items [get] |
the item entries | |
int | MaxItemID [get] |
the maximum item ID in the dataset | |
int | MaxUserID [get] |
the maximum user ID in the dataset | |
IList< int > | RandomIndex [get] |
get a randomly ordered list of all indices | |
RatingScale | Scale [get] |
information about the scale of the ratings in the dataset | |
float | this[int user_id, int item_id] [get] |
Directly access rating by user and item. | |
IList< int > | Users [get] |
the user entries |
Interface for rating datasets.
void Add | ( | int | user_id, |
int | item_id, | ||
byte | rating | ||
) |
Add byte-valued rating to the collection.
user_id | the user ID |
item_id | the item ID |
rating | the rating |
Implemented in Ratings, and StaticByteRatings.
void Add | ( | int | user_id, |
int | item_id, | ||
float | rating | ||
) |
Add float-valued rating to the collection.
user_id | the user ID |
item_id | the item ID |
rating | the rating |
Implemented in Ratings, StaticByteRatings, StaticRatings, and TimedRatings.
float Get | ( | int | user_id, |
int | item_id, | ||
ICollection< int > | indexes | ||
) |
Directly access rating by user and item.
user_id | the user ID |
item_id | the item ID |
indexes | the indexes to look at |
Implemented in StaticByteRatings, and Ratings.
int GetIndex | ( | int | user_id, |
int | item_id | ||
) | [inherited] |
Get index for a given user and item.
user_id | the user ID |
item_id | the item ID |
Implemented in DataSet.
int GetIndex | ( | int | user_id, |
int | item_id, | ||
ICollection< int > | indexes | ||
) | [inherited] |
Get index for given user and item.
user_id | the user ID |
item_id | the item ID |
indexes | the indexes to look at |
Implemented in DataSet.
ISet<int> GetItems | ( | IList< int > | indices | ) | [inherited] |
Get all items that are referenced by a given list of indices.
indices | the indices to take into account |
Implemented in DataSet.
ISet<int> GetUsers | ( | IList< int > | indices | ) | [inherited] |
Get all users that are referenced by a given list of indices.
indices | the indices to take into account |
Implemented in DataSet.
void InitScale | ( | ) |
Initialize the Scale property.
Implemented in Ratings, and StaticByteRatings.
void RemoveItem | ( | int | item_id | ) | [inherited] |
Remove all events related to a given item.
item_id | the item ID |
Implemented in Ratings, DataSet, PosOnlyFeedback< T >, StaticRatings, and RatingsProxy.
void RemoveUser | ( | int | user_id | ) | [inherited] |
Remove all events related to a given user.
user_id | the user ID |
Implemented in Ratings, DataSet, PosOnlyFeedback< T >, StaticRatings, and RatingsProxy.
bool TryGet | ( | int | user_id, |
int | item_id, | ||
out float | rating | ||
) |
Try to retrieve a rating for a given user-item combination.
user_id | the user ID |
item_id | the item ID |
rating | will contain the first rating encountered that matches the user ID and item ID |
Implemented in StaticByteRatings, and Ratings.
bool TryGet | ( | int | user_id, |
int | item_id, | ||
ICollection< int > | indexes, | ||
out float | rating | ||
) |
Try to retrieve a rating for a given user-item combination.
user_id | the user ID |
item_id | the item ID |
indexes | the indexes to look at |
rating | will contain the first rating encountered that matches the user ID and item ID |
Implemented in StaticByteRatings, and Ratings.
bool TryGetIndex | ( | int | user_id, |
int | item_id, | ||
out int | index | ||
) | [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 |
Implemented in DataSet.
bool TryGetIndex | ( | int | user_id, |
int | item_id, | ||
ICollection< int > | indexes, | ||
out int | index | ||
) | [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 |
Implemented in DataSet.
IList<IList<int> > ByItem [get, inherited] |
IList<IList<int> > ByUser [get, inherited] |
new int Count [get] |
IList<int> CountByItem [get, inherited] |
IList<int> CountByUser [get, inherited] |
IList<int> RandomIndex [get, inherited] |
get a randomly ordered list of all indices
Should be implemented as a lazy data structure
Implemented in DataSet.
RatingScale Scale [get] |
information about the scale of the ratings in the dataset
Implemented in Ratings.
float this[int user_id, int item_id] [get] |
Directly access rating by user and item.
user_id | the user ID |
item_id | the item ID |
the rating value for the given user and item
Implemented in Ratings, and StaticByteRatings.