question: public SVMExamples ( ObjectInputStream in ) throws IOException { this ( in . readInt ( ) , in . readDouble ( ) ) ; this . dim = in . readInt ( ) ; String scaleString = in . readUTF ( ) ; if ( scaleString . equals ( "scale" ) ) { int numberOfAttributes = in . readInt ( ) ; this . meanVarianceMap = new HashMap < Integer , MeanVariance > ( ) ; for ( int i = 0 ; i < numberOfAttributes ; i ++ ) { int index = in . readInt ( ) ; double mean = in . readDouble ( ) ; double variance = in . readDouble ( ) ; meanVarianceMap . put ( Integer . valueOf ( index ) , new MeanVariance ( mean , variance ) ) ; } } for ( int e = 0 ; e < this . train_size ; e ++ ) { index [ e ] = new int [ in . readInt ( ) ] ; atts [ e ] = new double [ index [ e ] . length ] ; for ( int a = 0 ; a < index [ e ] . length ; a ++ ) { index [ e ] [ a ] = in . readInt ( ) ; atts [ e ] [ a ] = in . readDouble ( ) ; } alphas [ e ] = in . readDouble ( ) ; ys [ e ] = in . readDouble ( ) ; } }
target:  Reads an example set from the given input stream. 