question: public MixedBicScore ( DataSet dataSet ) { if ( dataSet == null ) { throw new NullPointerException ( ) ; } setDataSet ( dataSet ) ; this . variables = dataSet . getVariables ( ) ; this . sampleSize = dataSet . getNumRows ( ) ; this . penaltyDiscount = 4 ; logn = Math . log ( sampleSize ) ; }
target:  Constructs the score using a covariance matrix.