ALS_ScalaTion

Implementation of Alternating Least Squares Algorithm(Implicit Data) by ScalaTion.
Environment: Scala(2.12.13) + sbt(1.4.7) + ScalaTion(1.6, all packages).

About ScalaTion:

ScalaTion is a Scala-based system for Simulation, Optimization and Analytics. For here we use the 1.6 version with DEBUG = false. [project]

About ALS algorithm:

"Collaborative Filtering for Implicit Feedback Data". [paper]

About dataset:

The testing dataset is MovieLens 100k(sorted_data.txt, u2.base, u2.test). [data] We use MAE and RMSE to judge the quality.

Run the code:

For recommender algorithm:

To run the code:(In bash)

sbt 
compile 
runMain CFRecommenderTest

Also you can just run ALSTest, and that is a pure object for Matrix Factorization:

To run the code:(In bash)

sbt 
compile 
runMain ALSTest