Method compare

JSAT/src/jsat/classifiers/trees/DecisionStump.java:869–873

(DataPointPair<Double> o1, DataPointPair<Double> o2)

                        Comparator<DataPointPair<Double>> dppDoubleSorter = new Comparator<DataPointPair<Double>>()
                        {
                            @Override
                            public int compare(DataPointPair<Double> o1, DataPointPair<Double> o2)
                            {
                                return Double.compare(o1.getVector().get(numAttri), o2.getVector().get(numAttri));
                            }
                        };
                        Collections.sort(DPs, dppDoubleSorter);//this will put nans to the right