//method which plots the acf and pacf for the data
public void HookUpData()
{
System.Windows.Forms.Cursor old = this.Cursor;
this.Cursor = Cursors.AppStarting;
this.show();
this.hidesubset();
//if you pick an alternative tab, then you want the ACF and PACF for the previously differenced data set to be hidden
ARIMAac2.Hide();
this.P = new Statistics(Tseries);
//calculate the autcorrelation and partial autocorrelation of the data
List<double> sac = P.sampleautocorrelation(P.D, 50);
sac.RemoveAt(0);
List<double> spac = P.samplepartialautocorrelation(P.D, 50);
spac.RemoveAt(0);
//we will use the following code to create the horizontal lines in the ACF and PACF plots
int n = this.P.D.Count();
double l1 = 1.96 / Math.Sqrt(n);
double l2 = -1.96 / Math.Sqrt(n);
List<double> line1 = new List<double>();
List<double> line2 = new List<double>();
for (int i = 0; i < sac.Count(); i++)
{
line1.Add(l1);
line2.Add(l2);
}
//plot of the sample acf and pacf
ARIMAac1.Titles.Clear();
ARIMAac1.Titles.Add(new Title("Sample ACF and PACF", Docking.Top, new Font("Verdana", 8f, FontStyle.Bold), Color.Black));
ARIMAac1.ChartAreas[0].AxisY.LabelStyle.Font = ARIMAac1.ChartAreas[0].AxisX.LabelStyle.Font = new Font("Arial", 11, GraphicsUnit.Pixel);
ARIMAac1.ChartAreas[0].RecalculateAxesScale();
ARIMAac1.Series.Clear();
var series1 = new System.Windows.Forms.DataVisualization.Charting.Series
{
Name = "ACF",
Color = System.Drawing.Color.Blue,
IsVisibleInLegend = true,
IsXValueIndexed = true,
ChartType = SeriesChartType.Column
};
this.ARIMAac1.Series.Add(series1);
int z = 0;
foreach (double dd in sac)
{
series1.Points.AddXY(z + 1, sac[z]);
z++;
}
var series2 = new System.Windows.Forms.DataVisualization.Charting.Series
{
Name = "PACF",
Color = System.Drawing.Color.Red,
IsVisibleInLegend = true,
IsXValueIndexed = true,
ChartType = SeriesChartType.Column
};
this.ARIMAac1.Series.Add(series2);
z = 0;
foreach (double dd in spac)
{
series2.Points.AddXY(z + 1, spac[z]);
z++;
}
var series21 = new System.Windows.Forms.DataVisualization.Charting.Series
{
Name = "Series21",
Color = System.Drawing.Color.Black,
IsVisibleInLegend = false,
IsXValueIndexed = true,
ChartType = SeriesChartType.Line
};
this.ARIMAac1.Series.Add(series21);
z = 0;
foreach (double dd in line1)
{
series21.Points.AddXY(z + 1, line1[z]);
z++;
}
var series22 = new System.Windows.Forms.DataVisualization.Charting.Series
{
Name = "Series22",
Color = System.Drawing.Color.Black,
IsVisibleInLegend = false,
IsXValueIndexed = true,
ChartType = SeriesChartType.Line
};
this.ARIMAac1.Series.Add(series22);
z = 0;
foreach (double dd in line2)
{
series22.Points.AddXY(z + 1, line2[z]);
z++;
}
ARIMAac1.Invalidate();
ARIMAac1.ChartAreas[0].AxisY.Maximum = Math.Max(P.maximum(sac), P.maximum(spac));
this.Cursor = old;
}