public static RecommenderResult RecommendUser(
this IMatrixFactorizationRecommender recommender,
IEnumerable <string> items)
{
if (recommender == null)
{
throw new ArgumentNullException(nameof(recommender));
}
if (items == null)
{
throw new ArgumentNullException(nameof(items));
}
return(recommender.RecommendUser(recommender.ComputeUserFactors(items)));
}
public static RecommenderResult RecommendUser(
this IMatrixFactorizationRecommender recommender,
UserFeatures user)
{
if (recommender == null)
{
throw new ArgumentNullException(nameof(recommender));
}
if (user == null)
{
throw new ArgumentNullException(nameof(user));
}
return(recommender.RecommendUser(user, RecommenderResultBuilderFactory.Instance));
}
public static RecommenderResult RecommendUser(
this IMatrixFactorizationRecommender recommender,
Dictionary <string, double> items)
{
if (recommender == null)
{
throw new ArgumentNullException(nameof(recommender));
}
if (items == null)
{
throw new ArgumentNullException(nameof(items));
}
return(recommender.RecommendUser(recommender.ComputeUserFeatures(items)));
}
public static UserFeatures ComputeUserFactors(
this IMatrixFactorizationRecommender recommender,
IEnumerable <string> items)
{
if (recommender == null)
{
throw new ArgumentNullException(nameof(recommender));
}
if (items == null)
{
throw new ArgumentNullException(nameof(items));
}
return(recommender.ComputeUserFeatures(items.ToDictionary(o => o, o => 1.0)));
}
public static RecommenderResult RankUsers(
this IMatrixFactorizationRecommender recommender,
string userId,
IEnumerable <KeyValuePair <string, Dictionary <string, double> > > userItems)
{
if (recommender == null)
{
throw new ArgumentNullException(nameof(recommender));
}
if (userId == null)
{
throw new ArgumentNullException(nameof(userId));
}
if (userItems == null)
{
throw new ArgumentNullException(nameof(userItems));
}
return(recommender.RankUsers(userId, userItems.Select(o => new KeyValuePair <string, UserFeatures>(o.Key, recommender.ComputeUserFeatures(o.Value))).ToList()));
}
public static RecommenderResult RankUsers(
this IMatrixFactorizationRecommender recommender,
UserFeatures user,
List <KeyValuePair <string, UserFeatures> > users)
{
if (recommender == null)
{
throw new ArgumentNullException(nameof(recommender));
}
if (user == null)
{
throw new ArgumentNullException(nameof(user));
}
if (users == null)
{
throw new ArgumentNullException(nameof(users));
}
return(recommender.RankUsers(user, users, RecommenderResultBuilderFactory.Instance));
}
