Factorizes the rating matrix using "Alternating-Least-Squares with Weighted-λ-Regularization" as described in
"Large-scale Collaborative Filtering for the Netflix Prize"
also supports the implicit feedback variant of this approach as described in "Collaborative Filtering for Implicit
Feedback Datasets" available at http://research.yahoo.com/pub/2433
Inheritance Hierarchy
NReco.CF.Taste.Impl.Recommender.SVD AbstractFactorizer
NReco.CF.Taste.Impl.Recommender.SVD ALSWRFactorizer
Namespace: NReco.CF.Taste.Impl.Recommender.SVD
Assembly: NReco.Recommender (in NReco.Recommender.dll) Version: 1.0.0.0 (1.0.0.0)
Syntax
The ALSWRFactorizer type exposes the following members.
Constructors
| Name | Description | |
|---|---|---|
 | ALSWRFactorizer(IDataModel, Int32, Double, Int32) | Initializes a new instance of the ALSWRFactorizer class |
| ALSWRFactorizer(IDataModel, Int32, Double, Int32, Boolean, Double) | Initializes a new instance of the ALSWRFactorizer class |
| ALSWRFactorizer(IDataModel, Int32, Double, Int32, Boolean, Double, Int32) | Initializes a new instance of the ALSWRFactorizer class |
Methods
| Name | Description | |
|---|---|---|
 | createFactorization | (Inherited from AbstractFactorizer.) |
| Equals | (Inherited from Object.) |
| Factorize | (Overrides AbstractFactorizer Factorize .) |
| Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
| GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| itemFeaturesMapping | |
| itemIndex | (Inherited from AbstractFactorizer.) |
| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
 | ratingVector | |
| Refresh | (Inherited from AbstractFactorizer.) |
| sparseItemRatingVector | |
| sparseUserRatingVector | |
| ToString | Returns a string that represents the current object. (Inherited from Object.) |
| userFeaturesMapping | |
| userIndex | (Inherited from AbstractFactorizer.) |
See Also