question: @ Override public Instances defineDataFormat ( ) throws Exception { setOptions ( getOptions ( ) ) ; checkCoverage ( ) ; Random random = new Random ( getSeed ( ) ) ; setRandom ( random ) ; Instances dataset ; ArrayList < Attribute > attributes = new ArrayList < Attribute > ( 3 ) ; Attribute attribute ; boolean classFlag = getClassFlag ( ) ; ArrayList < String > classValues = null ; if ( classFlag ) { classValues = new ArrayList < String > ( getClusters ( ) . length ) ; } ArrayList < String > boolValues = new ArrayList < String > ( 2 ) ; boolValues . add ( "false" ) ; boolValues . add ( "true" ) ; ArrayList < String > nomValues = null ; for ( int i = 0 ; i < getNumAttributes ( ) ; i ++ ) { if ( m_booleanCols . isInRange ( i ) ) { attribute = new Attribute ( "B" + i , boolValues ) ; } else if ( m_nominalCols . isInRange ( i ) ) { nomValues = new ArrayList < String > ( m_numValues [ i ] ) ; for ( int j = 0 ; j < m_numValues [ i ] ; j ++ ) { nomValues . add ( "value-" + j ) ; } attribute = new Attribute ( "N" + i , nomValues ) ; } else { attribute = new Attribute ( "X" + i ) ; } attributes . add ( attribute ) ; } if ( classFlag ) { for ( int i = 0 ; i < getClusters ( ) . length ; i ++ ) { classValues . add ( "c" + i ) ; } attribute = new Attribute ( "class" , classValues ) ; attributes . add ( attribute ) ; } dataset = new Instances ( getRelationNameToUse ( ) , attributes , 0 ) ; if ( classFlag ) { dataset . setClassIndex ( m_NumAttributes ) ; } Instances format = new Instances ( dataset , 0 ) ; setDatasetFormat ( format ) ; for ( int i = 0 ; i < getClusters ( ) . length ; i ++ ) { SubspaceClusterDefinition cl = ( SubspaceClusterDefinition ) getClusters ( ) [ i ] ; cl . setNumInstances ( random ) ; cl . setParent ( this ) ; } return dataset ; }
target:  Initializes the format for the dataset produced.