private void DrawBeta(int Alpha, int Beta, string Name)
{
Series series = new Series(Name);
series.BorderWidth = 3;
series.ChartType = SeriesChartType.Spline;
double Temp = 0;
for (double i = 0.01; i < 1; i = i + 0.05)
{
Temp = Stat.BetaPDF(i, Alpha, Beta);
if (MaxValue < Temp)
{
MaxValue = Temp;
}
series.Points.AddXY(i, Temp);
}
chart_PosteriorDensity.Series.Add(series);
var XAxis = chart_PosteriorDensity.ChartAreas[0].AxisX;
XAxis.MajorGrid.Enabled = false;
var YAxis = chart_PosteriorDensity.ChartAreas[0].AxisY;
YAxis.MajorGrid.Enabled = false;
XAxis.Maximum = 1;
XAxis.Minimum = 0;
YAxis.Maximum = Math.Ceiling(MaxValue);
}
private void DrawBeta(int AlphaIndex, List <int> AlphaList, string Name, int[] CountTimes, int PriorOrPost = 0)
{
//PriorOrPost = 0为先验，即减去样本数
//PriorOrPost = 1为后验
int InterestAlpha = 0;
if (PriorOrPost == 0)
{
InterestAlpha = AlphaList[AlphaIndex] - CountTimes[AlphaIndex];
}
else
{
InterestAlpha = AlphaList[AlphaIndex];
}
int OtherAlphas = 0;
if (PriorOrPost == 0)
{
OtherAlphas = AlphaList.Sum() - CountTimes.Sum() - InterestAlpha;
}
else
{
OtherAlphas = AlphaList.Sum() - InterestAlpha;
}
if (chart_PosteriorDensity.Series.IndexOf(Name) != -1)
{
MessageBox.Show("图上已经存在相应分布，请勿重复添加！");
return;
}
Series series = new Series(Name);
series.BorderWidth = 3;
series.ChartType = SeriesChartType.Spline;
double Temp = 0;
for (double i = 0.01; i < 1; i = i + 0.05)
{
Temp = Stat.BetaPDF(i, InterestAlpha, OtherAlphas);
if (MaxValue < Temp)
{
MaxValue = Temp;
}
series.Points.AddXY(i, Temp);
}
chart_PosteriorDensity.Series.Add(series);
var XAxis = chart_PosteriorDensity.ChartAreas[0].AxisX;
XAxis.MajorGrid.Enabled = false;
var YAxis = chart_PosteriorDensity.ChartAreas[0].AxisY;
YAxis.MajorGrid.Enabled = false;
XAxis.Maximum = 1;
XAxis.Minimum = 0;
YAxis.Maximum = Math.Ceiling(MaxValue);
}
