question: @ Override public Instances defineDataFormat ( ) throws Exception { ArrayList < Attribute > atts ; m_Random = new Random ( getSeed ( ) ) ; m_NoiseRandom = new Random ( getSeed ( ) ) ; setNumExamplesAct ( getNumExamples ( ) ) ; atts = new ArrayList < Attribute > ( ) ; atts . add ( new Attribute ( "x" ) ) ; atts . add ( new Attribute ( "y" ) ) ; m_DatasetFormat = new Instances ( getRelationNameToUse ( ) , atts , 0 ) ; return m_DatasetFormat ; }
target:  Initializes the format for the dataset produced. Must be called before the generateExample or generateExamples methods are used. Re-initializes the random number generator with the given seed.