code: public static double maxAbsolute(FlatDataCollection flatDataCollection) {
          double maxAbs=0.0;
  
          Iterator<Double> it = flatDataCollection.iteratorDouble();
          while(it.hasNext()) {
              Double v = it.next();
              if(v != null) {
                  maxAbs= Math.max(maxAbs, Math.abs(v));
              }
          }
  
          return maxAbs;
      }
docs: Calculates Maximum absolute value.
  
  @param flatDataCollection
  @return