private static void ConvertToLogEqualWidthFiveScale(int userCount, string playcountsFile, string saveFile)
        {
            var ratings = RatingProvider.Load(playcountsFile);

            ratings.ConvertToLogEqualWidthFiveScale(userCount);
            RatingProvider.Save(saveFile, ratings);
        }
        private static void LogNormalize(int userCount, string playcountsFile, string saveFile)
        {
            var rating = RatingProvider.Load(playcountsFile);

            rating.LogNormalize(userCount);
            RatingProvider.Save(saveFile, rating);
        }