public void Train(UserBehavior db)
        {
            UserBehaviorTransformer ubt = new UserBehaviorTransformer(db);

            ratings = ubt.GetUserMenuRatingsTable(rater);

            List <MenuCategoryCounts> menuCategories = ubt.GetMenuCategoryCounts();

            ratings.AppendMenuFeatures(menuCategories);

            FillTransposedRatings();
        }