public GenericUserSimilarity(UserSimilarity otherSimilarity, DataModel dataModel, int maxToKeep)
{
this.similarityMaps = new FastByIDMap <FastByIDMap <double> >();
long[] itemIDs = longIteratorToList(dataModel.getUserIDs());
IEnumerator <UserUserSimilarity> allSimilarities = new DataModelSimilaritiesIterator(otherSimilarity, itemIDs);
this.initSimilarityMaps(TopItems.getTopUserUserSimilarities(maxToKeep, allSimilarities).GetEnumerator());
}
public GenericItemSimilarity(ItemSimilarity otherSimilarity, DataModel dataModel, int maxToKeep)
{
this.similarityMaps = new FastByIDMap <FastByIDMap <double?> >();
this.similarItemIDsIndex = new FastByIDMap <FastIDSet>();
long[] itemIDs = GenericUserSimilarity.longIteratorToList(dataModel.getItemIDs());
DataModelSimilaritiesIterator allSimilarities = new DataModelSimilaritiesIterator(otherSimilarity, itemIDs);
this.initSimilarityMaps(TopItems.getTopItemItemSimilarities(maxToKeep, allSimilarities).GetEnumerator());
}
public GenericUserSimilarity(IUserSimilarity otherSimilarity,
IDataModel dataModel,
int maxToKeep)
{
long[] userIDs = longIteratorToList(dataModel.GetUserIDs());
IEnumerator <UserUserSimilarity> it = new DataModelSimilaritiesIterator(otherSimilarity, userIDs);
var keptSimilarities = TopItems.GetTopUserUserSimilarities(maxToKeep, it);
initSimilarityMaps(keptSimilarities.GetEnumerator());
}
/// <p>
/// Like {@link #GenericItemSimilarity(ItemSimilarity, DataModel)} )}, but will only keep the specified
/// number of similarities from the given {@link DataModel}. It will keep those with the highest similarity
/// -- those that are therefore most important.
/// </p>
///
/// <p>
/// Thanks to tsmorton for suggesting this and providing part of the implementation.
/// </p>
///
/// @param otherSimilarity
/// other {@link ItemSimilarity} to get similarities from
/// @param dataModel
/// data model to get items from
/// @param maxToKeep
/// maximum number of similarities to keep
/// @throws TasteException
/// if an error occurs while accessing the {@link DataModel} items
public GenericItemSimilarity(IItemSimilarity otherSimilarity,
IDataModel dataModel,
int maxToKeep)
{
long[] itemIDs = GenericUserSimilarity.longIteratorToList(dataModel.GetItemIDs());
var it = new DataModelSimilaritiesIterator(otherSimilarity, itemIDs);
var keptSimilarities = TopItems.GetTopItemItemSimilarities(maxToKeep, it);
initSimilarityMaps(keptSimilarities.GetEnumerator());
}
