@DefaultImplementation(value=DefaultUserVectorNormalizer.class) public interface UserVectorNormalizer
Normalize a user’s vector. This vector is typically a rating or purchase vector.
This interface is essentially a user-aware version of
VectorNormalizer. The default implementation,
DefaultUserVectorNormalizer, delegates to a
VectorNormalizer. Implement this interface directly to create a normalizer that is aware of the fact that it is normalizing a user and e.g. uses user properties outside the vector to aid in the normalization. Otherwise, use a context-sensitive binding of
VectorNormalizer to configure the user vector normalizer:
InvertibleFunction<Long2DoubleMap,Long2DoubleMap> makeTransformation(long user, Long2DoubleMap vector)
Make a vector transformation for a user. The resulting transformation will be applied to user vectors to normalize and denormalize them.
user- The user ID to normalize for.
vector- The user’s vector to use as the reference vector.