NMath Stats User's Guide

TOC | Previous | Next | Index

7.7 Auxiliary Statistics (.NET, C#, CSharp, VB, Visual Basic, F#)

Class LogisticRegressionAuxiliaryStats computes auxiliary statistics for logistic regressions, such as pseudo R-squared metrics and odds ratios for the computed coefficients.

Code Example – C# logistic regression auxiliary statistics

var auxStats = new 
LogisticRegressionAuxiliaryStats<NewtonRaphsonParameterCalc>( lr );

Provided properties access the model statistics:

CoxSnell gets the Cox and Snell pseudo R-squared statistic for the model.

Nagelkerke gets the Nagelkerke pseudo R-squared statistic for the model.

LogLikelihoodFullModel gets the log of the value of the likelihood function for the full model (estimated coefficients).

LogLikelihoodInterceptOnly gets the log of the value of the likelihood function for the intercept-only model.

OddsRatios gets the odds ratio values for the computed coefficients. The odds ratio for the intercept parameter, if there is one, is not computed.

Finally, property LikelihoodRatioStat gets the likelihood ratio statistic and related values for the logistic regression. The result is returns as an instance of LikelihoodRatioStatistic.

Code Example – C# logistic regression auxiliary statistics

var lrs = auxStats.LikelihoodRatioStat;
Console.WriteLine( lrs.ChiSquareStatistic );
Console.WriteLine( lrs.RightTailProbability );


Top

Top