MyMediaLite
3.03
|
Abstract dataset class that implements some common functions. More...
Public Member Functions | |
DataSet () | |
Default constructor. | |
DataSet (IDataSet dataset) | |
Create new dataset view from an existing one. Share the underlying data structures, do not copy them. | |
DataSet (SerializationInfo info, StreamingContext context) | |
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. | |
virtual void | GetObjectData (SerializationInfo info, StreamingContext context) |
ISet< int > | GetUsers (IList< int > indices) |
Get all users that are referenced by a given list of indices. | |
abstract void | RemoveItem (int item_id) |
Remove all events related to a given item. | |
abstract void | RemoveUser (int user_id) |
Remove all events related to a given user. | |
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 | |
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 | |
IList< int > | Users [get, set] |
the user entries |
Abstract dataset class that implements some common functions.
DataSet | ( | ) | [inline] |
Default constructor.
Create new dataset view from an existing one. Share the underlying data structures, do not copy them.
dataset | the dataset to build from |
int GetIndex | ( | int | user_id, |
int | item_id | ||
) | [inline] |
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] |
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.
ISet<int> GetItems | ( | IList< int > | indices | ) | [inline] |
Get all items that are referenced by a given list of indices.
indices | the indices to take into account |
Implements IDataSet.
ISet<int> GetUsers | ( | IList< int > | indices | ) | [inline] |
Get all users that are referenced by a given list of indices.
indices | the indices to take into account |
Implements IDataSet.
abstract void RemoveItem | ( | int | item_id | ) | [pure virtual] |
Remove all events related to a given item.
item_id | the item ID |
Implements IDataSet.
Implemented in Ratings, PosOnlyFeedback< T >, StaticRatings, and RatingsProxy.
abstract void RemoveUser | ( | int | user_id | ) | [pure virtual] |
Remove all events related to a given user.
user_id | the user ID |
Implements IDataSet.
Implemented in Ratings, PosOnlyFeedback< T >, StaticRatings, and RatingsProxy.
bool TryGetIndex | ( | int | user_id, |
int | item_id, | ||
out int | index | ||
) | [inline] |
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] |
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] |
Indices organized by item.
IList<IList<int> > by_user [protected] |
Indices organized by user.
IList<int> count_by_item [protected] |
field for storing the count per item
IList<int> count_by_user [protected] |
field for storing the count per user
IList<IList<int> > ByItem [get] |
IList<IList<int> > ByUser [get] |
virtual int Count [get] |
the number of interaction events in the dataset
Implements IDataSet.
Reimplemented in StaticRatings.
IList<int> CountByItem [get] |
IList<int> CountByUser [get] |
IList<int> RandomIndex [get] |
get a randomly ordered list of all indices
Should be implemented as a lazy data structure
Implements IDataSet.