question: public static void write ( DataSet < ? > data , Path path , char delimiter ) throws IOException { BufferedWriter bw = Files . newBufferedWriter ( path , Charset . defaultCharset ( ) ) ; write ( data , bw , delimiter ) ; bw . close ( ) ; }
target:  Writes out the given dataset as a CSV file. If the given dataset is a regression or classification dataset, the target feature that is being predicted will always be written out as the first index in the CSV. <br> After that, all numeric features will be written out in order, followed by the categorical features.