StatTimeSerAnalysis.ARYuleWalkerFit Method

void ARYuleWalkerFit(TVec Data, TVec Phi, ref Double Sigma2, TVec StdErrs)

Yule-Walker AR estimation.

#NameDescription
1DataTime series.
2PhiReturns estimates for Phi coefficients. AR(p) order is determined by Phi length.
3Sigma2Returns estimate for Sigma^2 i.e. (AR) model variance.
4StdErrsIf not nil, it returns estimated phi coefficients standard errors.

Result: stored in self (calling object)

Remarks:

Performs Yule-Walker estimation for pure (AR) model.

Examples
using Dew.Math;
using Dew.Stats;
using Dew.Stats.Units;
namespace Dew.Examples
{
    private void Example()
    {
        Vector ts = new Vector(0);
        Vector phi = new Vector(0);
        double s2;
        ts.LoadFromFile("timeser.vec");
        phi.Length = 3; // for AR(3) process
        StatTimeSerAnalysis.ARYuleWalkerFit(ts,phi,out s2,null);
    }
}
See Also: StatTimeSerAnalysis.ARBurgFit