public override CompetitorRanks GenerateResult(int tournamentRunSequence, MatchStrategies.MatchStrategy matchStrategy, List<Competitor> competitors)
{
CompetitorPoints randomPoints = new CompetitorPoints();
foreach (Competitor competitor in competitors)
{
randomPoints.Add(competitor, _randomPointsGenerator.Next(1, 1000));
}
return randomPoints.GetCompetitorRanks();
}
public void GetCompetitorRanksTest()
{
var points = new CompetitorPoints();
double pointValue = 1.0;
var competitors = Helpers.CompetitorListHelper.GetStandardCompetitors(8);
foreach (var competitor in competitors)
{
points.Add(competitor, pointValue++);
}
var ranks = points.GetCompetitorRanks();
Assert.AreEqual(1, ranks[competitors[7]]);
Assert.AreEqual(2, ranks[competitors[6]]);
Assert.AreEqual(competitors.Count, ranks[competitors[0]]);
}
protected static CompetitorPoints AccumulateMatchPoints(List<Match> matches)
{
CompetitorPoints competitorPoints = new CompetitorPoints();
foreach (Match match in matches)
{
if (!competitorPoints.ContainsKey(match.Winner))
competitorPoints.Add(match.Winner, 0);
if (!competitorPoints.ContainsKey(match.Loser))
competitorPoints.Add(match.Loser, 0);
competitorPoints[match.Winner]++;
}
return competitorPoints;
}
/// <summary>
/// Runs through all tournament rounds and accumulates the point totals to the competitors.
/// </summary>
/// <param name="tournamentRounds"></param>
/// <remarks>
/// This may not be appropriate for all cases, since multiple rounds might not carry over points from previous rounds, or
/// rank may not be assigned purely on weight of total scores.
/// </remarks>
protected static CompetitorPoints AccumulatePointsFromTournamentRounds(List<TournamentRound> tournamentRounds)
{
CompetitorPoints competitorPoints = new CompetitorPoints();
foreach (TournamentRound tournamentRound in tournamentRounds)
{
foreach (Match match in tournamentRound.Matches)
{
if (!competitorPoints.ContainsKey(match.Winner))
competitorPoints.Add(match.Winner, 0);
if (!competitorPoints.ContainsKey(match.Loser))
competitorPoints.Add(match.Loser, 0);
competitorPoints[match.Winner]++;
}
}
return competitorPoints;
}
protected static new CompetitorPoints AccumulateMatchPoints(List<Match> matches)
{
List<Competitor> competitors = matches
.Select(x => x.Winner)
.Union(matches.Select(x => x.Loser))
.Distinct()
.ToList<Competitor>();
CompetitorPoints competitorPoints = new CompetitorPoints();
foreach (Competitor competitor in competitors)
{
competitorPoints.Add(competitor, 0.0);
}
for (int i = 0; i < competitors.Count - 1; i++)
{
for (int j = i + 1; j < competitors.Count; j++)
{
Competitor competitorA = competitors[i];
Competitor competitorB = competitors[j];
List<Match> aWins = matches
.Where(x => (x.Winner == competitorA && x.Loser == competitorB))
.ToList<Match>();
List<Match> bWins = matches
.Where(x => (x.Winner == competitorB && x.Loser == competitorA))
.ToList<Match>();
if (aWins.Count > 0 || bWins.Count > 0)
{
competitorPoints[competitorA] += Convert.ToDouble(aWins.Count) / (Convert.ToDouble(aWins.Count) + Convert.ToDouble(bWins.Count));
competitorPoints[competitorB] += Convert.ToDouble(bWins.Count) / (Convert.ToDouble(aWins.Count) + Convert.ToDouble(bWins.Count));
}
}
}
return competitorPoints;
}
/// <summary>
/// Computes the mean absolute difference between the expected and the observed tournament result.
/// </summary>
/// <param name="competitors"></param>
/// <returns></returns>
public double GetTournamentMAD(List<Competitor> competitors)
{
CompetitorPoints theoreticalRatings = new CompetitorPoints();
foreach (Competitor competitor in competitors)
{
theoreticalRatings.Add(competitor, competitor.TheoreticalRating);
}
CompetitorRanks theoreticalRanks = theoreticalRatings.GetCompetitorRanks();
// TODO: convert to using the StatisticsHelper or Iridium
double[] competitorDiffs = theoreticalRanks
.Select(x => Math.Abs((double)x.Value - (double)x.Key.TournamentRanks[RunSequence.Value]))
.ToArray<double>();
return new Helpers.StatisticsHelper(competitorDiffs).Mean;
}
