case pace2Estimator:
case pace4Estimator:
case pace6Estimator:
DoubleVector AHat = aHat.square();
ChisqMixture dc = new ChisqMixture();
dc.fit( AHat, MixtureDistribution.NNMMethod );
DoubleVector ATilde;
if( paceEstimator == pace6Estimator )
ATilde = dc.pace6( AHat );
else if( paceEstimator == pace2Estimator )
ATilde = dc.pace2( AHat );