Regress.ANOVA1 Method (TVec, TVec, TSample, TSample)

Perform the one-way analysis of variance where Data vector (one variable) is indexed by a second grouping GroupIndex vector variable.

public TANOVA1Result ANOVA1(TVec Data, TVec GroupIndex, ref double p, double alpha);

Parameters

Parameters	Description
Data	Data vector of single variable.
GroupIndex	Stores group indexes.
p	Returns the significance probability of null hypothesis that two means are equal. If p is less than desired significance alpha then the result suggests the null hypothesis (two means are equal) can be rejected.

Related Topics

ANOVA2

C# Example

The following example will perform ANOVA on single variable with three groups (0,1,2 - stored in GroupIndex vector).

using Dew.Math;
using Dew.Stats;
using Dew.Stats.Units;
namespace Dew.Examples
{
  private void Example()
  {
    Vector Data = new Vector(0);
    Vector GroupIndex = new Vector(0);
    double signprob;
    TANOVA1Result ar;
    Data.SetIt(false, new double[] {1,2,3,4,5,6,7,8,9,10,11,12});
    GroupIndex.SetIt(false, new double[] {0,0,0,0,1,1,1,1,2,2,2,2});
    ar = Regress.ANOVA1(Data,GroupIndex,out signprob,0.05);
    // ANOVARes = (SS1:128; SS2:15; SSTotal:143;
    // Deg1:2; Deg2:9; DegTotal:11; MS1:64;
    // MS2:1.6666666667; FDist:38.4; FCrit:4.2564947291)
    // signprob = 3.9210149408e-05
  }
}