public override string ToString()
{
return(_algorithm.ToString());
}
static bool ComputeErrorRate(IEvaluator evaluator, IRecommendation recommendation)
{
var watch = new Stopwatch();
try
{
var reader = new DataReader();
var subjects = Enumerable.Empty <Movie>();
var raters = Enumerable.Empty <User>();
var ratings = Enumerable.Empty <Rating>();
reader.ReadDataFromFiles(_moviesPath, _testRatingPath, out subjects, out raters, out ratings);
Console.WriteLine("Started: " + recommendation.ToString());
watch.Start();
var error = evaluator.CalculateError(recommendation, ratings, raters, subjects);
watch.Stop();
var algName = recommendation.ToString();
var errorName = evaluator.MethodName;
var text = string.Format("Algorithm: {0}\t{1}: {2}\tElapsed: {3}", algName, errorName, error,
watch.Elapsed);
Console.WriteLine(text);
using (var stream = File.AppendText("scores.txt"))
stream.WriteLine(text);
return(true);
}
catch (Exception ex)
{
if (watch.IsRunning)
{
watch.Stop();
}
var err = string.Format("{0} \n\n {1} \n\n {2}", watch.Elapsed, ex.Message, ex.StackTrace);
using (var stream = File.AppendText("error.txt"))
stream.WriteLine(err);
var innerEx = ex.InnerException;
while (innerEx != null)
{
err = string.Format("inner: \n\n {0} \n\n {1}", innerEx.Message, innerEx.StackTrace);
using (var stream = File.AppendText("error.txt"))
stream.WriteLine(err);
innerEx = innerEx.InnerException;
}
return(false);
}
}