string CreateStatisticsString(RegressionStatistics rs, string fmt, bool coeffs)
{
string s = "Statistics\n----------\n";
if (coeffs)
{
double[] k = rs.Coeffs;
for (int i = 0; i < k.Length; i++)
{
s += string.Format("k[{0}]\t= {1}\n", i, k[i].ToString(fmt));
}
}
s += string.Format(
"RSQ\t= {0}\nSEY\t= {1}\nF\t= {2}\nDF\t= {3}\nSSR\t= {4}\nSSE\t= {5}",
rs.Rsq.ToString(fmt), rs.Sey.ToString(fmt), rs.F.ToString(fmt),
rs.DF.ToString(fmt), rs.Ssr.ToString(fmt), rs.Sse.ToString(fmt));
return(s);
}
private void UpdateStatisticsLabel()
{
C1.Win.C1Chart.Label lbl;
if (c1Chart1.ChartLabels.LabelsCollection.Count < 1)
{
// create statistics label
lbl = c1Chart1.ChartLabels.LabelsCollection.AddNewLabel();
lbl.AttachMethod = AttachMethodEnum.Coordinate;
lbl.Style.BackColor = Color.FromArgb(192, Color.MistyRose);
lbl.Style.GradientStyle = GradientStyleEnum.None;
lbl.Style.Border.BorderStyle = BorderStyleEnum.Solid;
lbl.Style.Border.Color = Color.IndianRed;
lbl.Style.Border.Rounding.All = 15;
lbl.Compass = LabelCompassEnum.West;
lbl.Style.VerticalAlignment = C1.Win.C1Chart.AlignVertEnum.Center;
lbl.Style.Font = new Font("Lucida Console", 8);
}
else
{
lbl = c1Chart1.ChartLabels[0];
}
TrendLine tl = null;
if (c1Chart1.ChartGroups[0].ChartData.TrendsList.Count > 0)
{
tl = c1Chart1.ChartGroups[0].ChartData.TrendsList[0];
}
else
{
return;
}
RegressionStatistics rs = tl.RegressionStatistics;
bool isRegression = (tl.TrendLineType == TrendLineTypeEnum.Exponent) ||
(tl.TrendLineType == TrendLineTypeEnum.Fourier) ||
(tl.TrendLineType == TrendLineTypeEnum.Logarithmic) ||
(tl.TrendLineType == TrendLineTypeEnum.Polynom) ||
(tl.TrendLineType == TrendLineTypeEnum.Power);
if ((rs == null) && isRegression)
{
lblErrorData.Visible = true;
}
else
{
lblErrorData.Visible = false;
}
if (rs != null && cbViewStatistics.Checked)
{
lbl.Text = CreateStatisticsString(rs, "g4", false);
//string.Format(
//"Statistics\n----------\nRSQ\t= {0:g4}\nSEY\t= {1:g4}\nF\t= {2:g4}\nDF\t= {3:g4}\nSSR\t= {4:g4}\nSSE\t= {5:g4}",
//rs.Rsq, rs.Sey, rs.F, rs.DF, rs.Ssr, rs.Sse);
lbl.Visible = true;
}
else
{
lbl.Visible = false;
}
}
private void UpdateFormulaLabel()
{
C1.Win.C1Chart.Label lbl;
if (c1Chart1.ChartLabels.LabelsCollection.Count < 2)
{
// create formula label
lbl = c1Chart1.ChartLabels.LabelsCollection.AddNewLabel();
lbl.AttachMethod = AttachMethodEnum.Coordinate;
lbl.AttachMethodData.X = c1Chart1.ChartArea.PlotArea.Location.X + c1Chart1.ChartArea.PlotArea.Size.Width / 2;
lbl.AttachMethodData.Y = c1Chart1.ChartArea.PlotArea.Location.Y + 20;
lbl.Style.BackColor = Color.FromArgb(192, Color.LightBlue);
lbl.Style.GradientStyle = GradientStyleEnum.None;
lbl.Style.Border.BorderStyle = BorderStyleEnum.Solid;
lbl.Style.Border.Color = Color.DarkBlue;
lbl.Style.Border.Rounding.All = 15;
lbl.Style.VerticalAlignment = AlignVertEnum.Center;
lbl.Compass = LabelCompassEnum.North;
}
else
{
lbl = c1Chart1.ChartLabels[1];
}
TrendLine tl = null;
if (c1Chart1.ChartGroups[0].ChartData.TrendsList.Count > 0)
{
tl = c1Chart1.ChartGroups[0].ChartData.TrendsList[0];
}
else
{
return;
}
RegressionStatistics rs = tl.RegressionStatistics;
if (rs == null || rs.Coeffs == null || !cbViewFormula.Checked)
{
lbl.Visible = false;
return;
}
TrendLineTypeEnum tlt = (TrendLineTypeEnum)cbTrendType.SelectedItem;
string s_regr = GetFormula(tlt, rs.Coeffs);
string s_exact = GetFormula(dtLastGenerated, k);
if (s_regr.Length > 0 && s_exact.Length > 0)
{
lbl.Visible = true;
lbl.Text = string.Format("Data formula: {0}\n\nRegression formula: {1}", s_exact, s_regr);
}
else if (s_regr.Length > 0)
{
lbl.Visible = true;
lbl.Text = string.Format("Regression formula: {1}", s_exact, s_regr);
}
else
{
lbl.Visible = false;
}
}
