/// <summary>
/// Tries the parse.
/// </summary>
/// <param name="formula">The formula.</param>
/// <param name="evaluator">The evaluator.</param>
/// <returns></returns>
public bool TryParse(string formula, out Func <MediaFile, string> evaluator)
{
RatingEval rz = new RatingEval()
{
_marker = this._rating.Marker
};
evaluator = rz.GetRating;
return(true);
}
public static void Main(string[] args)
{
// load the data
var user_mapping = new EntityMapping();
var item_mapping = new EntityMapping();
var training_data = MyMediaLite.IO.RatingPrediction.Read(args[0], user_mapping, item_mapping);
var test_data = MyMediaLite.IO.RatingPrediction.Read(args[1], user_mapping, item_mapping);
// set up the recommender
var recommender = new UserItemBaseline();
recommender.Ratings = training_data;
recommender.Train();
// measure the accuracy on the test data set
var results = RatingEval.Evaluate(recommender, test_data);
Console.WriteLine("RMSE={0} MAE={1}", results["RMSE"], results["MAE"]);
// make a prediction for a certain user and item
Console.WriteLine(recommender.Predict(user_mapping.ToInternalID(1), item_mapping.ToInternalID(1)));
}
