question: public static void writeHistogram ( TDoubleDoubleHashMap distr , String filename ) throws FileNotFoundException , IOException { BufferedWriter aWriter = IOUtils . getBufferedWriter ( filename ) ; aWriter . write ( "bin\tcount" ) ; aWriter . newLine ( ) ; double [ ] keys = distr . keys ( ) ; Arrays . sort ( keys ) ; for ( double key : keys ) { aWriter . write ( String . valueOf ( key ) ) ; aWriter . write ( "\t" ) ; aWriter . write ( String . valueOf ( distr . get ( key ) ) ) ; aWriter . newLine ( ) ; } aWriter . close ( ) ; }
target:  Writes a histogram as a TAB-separated file with two columns: the first column indicates the bin key (e.g. upper bin border), the second column displays the count/share values.