BetweenGroup: Integer;
The BetweenGroup property returns the number of degrees of freedom between groups.
Sub Main;
Var
VA: ISmVarianceAnalysis;
res: Integer;
m: Array Of Double;
SS: IVarianceAnalysisSumSquared;
DF: IVarianceAnalysisDegreeOfFreedom;
UE: IVarianceAnalysisUnbiasedEstimation;
FS, FC, P: IVarianceAnalysisStatistics;
Begin
VA := New SmVarianceAnalysis.Create;
m := New Double[5, 3];
m[0, 0] := 1; m[0, 1] := 4; m[0, 2] := 1;
m[1, 0] := 2; m[1, 1] := 3; m[1, 2] := 2;
m[2, 0] := 3; m[2, 1] := 3; m[2, 2] := 1;
m[3, 0] := 4; m[3, 1] := 1; m[3, 2] := 2;
m[4, 0] := 5; m[4, 1] := 1; m[4, 2] := 1;
VA.Data := m;
VA.AnalysisType := VarianceAnalysisType.SingleFactor; //univariate analysis
VA.ConfidenceLevel := 0.05;
res := VA.Execute;
If res <> 0 Then
Debug.WriteLine(VA.Errors);
Else
Debug.WriteLine("Number of degrees of freedom");
DF := VA.DegreeOfFreedom;
Debug.WriteLine("between groups: " + DF.BetweenGroup.ToString);
Debug.WriteLine("within groups: " + DF.WithinGroup.ToString);
Debug.WriteLine("total: " + DF.Total.ToString);
End If;
End Sub Main;
Executing the example displays the results of the variance analysis in the console window:
Module execution started
Number of degrees of freedom
between groups: 2
within groups: 12
Total: 14
Module execution finished
See also: