question: public static final double calcNiceNumber ( final double RANGE , final boolean ROUND ) { double niceFraction ; double exponent = Math . floor ( Math . log10 ( RANGE ) ) ; double fraction = RANGE / Math . pow ( 10 , exponent ) ; if ( ROUND ) { if ( Double . compare ( fraction , 1.5 ) < 0 ) { niceFraction = 1 ; } else if ( Double . compare ( fraction , 3 ) < 0 ) { niceFraction = 2 ; } else if ( Double . compare ( fraction , 7 ) < 0 ) { niceFraction = 5 ; } else { niceFraction = 10 ; } } else { if ( Double . compare ( fraction , 1 ) <= 0 ) { niceFraction = 1 ; } else if ( Double . compare ( fraction , 2 ) <= 0 ) { niceFraction = 2 ; } else if ( Double . compare ( fraction , 5 ) <= 0 ) { niceFraction = 5 ; } else { niceFraction = 10 ; } } return niceFraction * Math . pow ( 10 , exponent ) ; }
target:  Returns a "niceScaling" number approximately equal to the range. Rounds the number if ROUND == true. Takes the ceiling if ROUND = false.