public override Multiset <long> SampleElectorate(int voteCount)
{
var prefInfo = PreferenceInformation.InferPreferences(districts[districtIndex]);
districtIndex++;
double swap2 = Rand.NextDouble() * MaxChanceSwap2;
double swap3 = Math.Min(Rand.NextDouble() * MaxChanceSwap3, swap2);
var evolved = prefInfo.Evolve(swap2, swap3);
var result = evolved.ToMultiset(voteCount);
return(result);
}
public static PreferenceFile FromStream(Stream strm)
{
var result = new PreferenceFile();
var csv = CSVReader.ReadFromStream(strm).ToList();
var headerRow = csv[0];
var current = headerRow.IndexOf("CURRENT");
var prev = headerRow.IndexOf("PREVIOUS");
var weight = headerRow.IndexOf("WEIGHT");
var parties = headerRow.ToList();
parties.Remove("CURRENT");
parties.Remove("PREVIOUS");
parties.Remove("WEIGHT");
result.partyNames = parties;
var partiesIndex = (from x in parties select headerRow.IndexOf(x)).ToList();
for (int i = 1; i < csv.Count; i++)
{
var row = csv[i];
List <double> rawScores = new List <double>();
for (int j = 0; j < parties.Count; j++)
{
rawScores.Add(double.Parse(row[partiesIndex[j]]));
}
var actualVote = parties.IndexOf(row[current]);
var prevVote = parties.IndexOf(row[prev]);
if (row[weight].Trim() == string.Empty)
{
continue;
}
var currentWeight = double.Parse(row[weight]);
var indicies = DiscreteMath.GetIntList(parties.Count);
var preferenceOrder = (from x in indicies
orderby(actualVote == x ? 1 : 0) descending, rawScores[x] descending, Rand.NextDouble() descending
select x).ToList();
var secondPreference = preferenceOrder[1];
var thirdPreference = preferenceOrder[2];
var info = new PreferenceInformation();
info.FirstIndex = actualVote;
info.SecondIndex = secondPreference;
info.ThirdIndex = thirdPreference;
info.Weight = currentWeight;
result.preferenceInformation.Add(info);
}
return(result);
}
