Find the bin index associated with numerical value x.
Find the bin index associated with numerical value x.
-1 if x is out of range; the bin index otherwise.
Get a sequence of valid indexes.
Return true iff x is in the nanflow region (equal to NaN).
Return true iff x is in the overflow region (greater than high).
Get the low and high edge of a bin (given by index number).
Return true iff x is in the underflow region (less than low).