/// <summary>
/// 获得Qp相关的组合，只针对PLC_CNT=3的情况
/// </summary>
/// <param name="comb"></param>
/// <param name="index"></param>
/// <returns></returns>
private static int[] getQpRelationIndice(common.Math.Combination comb, int index)
{
if (comb.M != 2)
{
return(null);
}
int[] c = comb.Combine(index);
List <int> ret = new List <int>();
ret.Add(index);
for (int i = 0; i < comb.N; i++)
{
if (Array.IndexOf(c, i) == -1)
{
ret.Add(comb.Index(new int[] { i, c[0] }));
ret.Add(comb.Index(new int[] { i, c[1] }));
}
}
return(ret.ToArray());
}
public static double[][] calcMinMaxOddsForQp(HrsTable table, double[] betRate, double r)
{
if (betRate == null)
{
return(null);
}
int CNT = table.Count;
int PLC_CNT = 3;
if (CNT <= table.PLC_SPLIT_POS)
{
PLC_CNT = 2;
}
common.Math.Combination comb = new common.Math.Combination(CNT, 2);
if (betRate.Length != comb.Length)
{
return(null);
}
if (PLC_CNT == 2)
{
double[] odds = betRate.Select(x => r < x ? 1 : r / x).ToArray();
return(new double[][] { odds, odds });
}
else
{
double[] odds_min = new double[betRate.Length];
double[] odds_max = new double[betRate.Length];
for (int i = 0; i < betRate.Length; i++)
{
//int[] rel_indices = getQpRelationIndice(comb, i);
//double[] rel_rates = new double[rel_indices.Length];
//for (int j = 0; j < rel_indices.Length; j++) rel_rates[j] = betRate[rel_indices[j]];
//IOrderedEnumerable<double> sorted_rate = rel_rates.OrderByDescending(x => x);
double br0 = betRate[i];
int[] c = comb.Combine(i);
double min = double.MaxValue, max = double.MinValue;
for (int j = 0; j < CNT; j++)
{
if (Array.IndexOf(c, j) == -1)
{
double br1 = betRate[comb.Index(new int[] { j, c[0] })];
double br2 = betRate[comb.Index(new int[] { j, c[1] })];
double od = 1 + (r - br1 - br2 - br0) / 3 / br0;
if (od < min)
{
min = od;
}
if (od > max)
{
max = od;
}
}
}
odds_min[i] = min;
odds_max[i] = max;
}
return(new double[][] { odds_min, odds_max });
}
}
