date.iterator.count.isodata.Point Maven / Gradle / Ivy

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package date.iterator.count.isodata;

import date.iterator.count.util.CalculationUtil;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Point {

//    private double y; // 客户价值
//    private double x; // avg_interval与最后一次购买时间的差值

    //字段名和值
    private Map values;

    private long id;

    public Point() {
        values = new HashMap<>();
    }

    public Point(final Map values) {
        this.values = values;
    }

    /*作为中心点的虚点方法，正常点不可使用，有空建立个Center对象，方法用于聚类拆分时，产生新的虚中心点*/
    public Point displaceAxisOpposite(final String key, final Double value) {
        double newValue = value;
        if (values.containsKey(key)) {
            newValue += values.get(key);
        }
        values.put(key, newValue);
        return this;
    }

    public Point Copy() {
        Point point = new Point();
        for (String each : values.keySet()) {
            point.getValues().put(each, this.values.get(each));
        }
        return point;
    }

    @Deprecated
    private double standardDeviation(final Point anotherPoint) {
        double squaredError = 0;
        for (String eachTitle : ISODataConstants.Data_Value_Title) {
            Double otherValue = anotherPoint.getValues().get(eachTitle);
            Double curretValue = values.get(eachTitle);
            squaredError += Math.pow(Math.abs(otherValue - curretValue), 2);
        }
        squaredError = squaredError / ISODataConstants.Data_Value_Title.length;
        return Math.sqrt(squaredError);
    }

    /*
    * 两点间欧式距离
    * */
    public double distanceEuclidean(final Point anotherPoint) {
        return CalculationUtil.distanceEuclidean(this, anotherPoint);
    }

    /*
    * 到各聚类中心的欧式距离
    * */
    public List calculateCenterDistances(final List clusters) {
        List result = new ArrayList<>();
        for (Cluster eachCluster : clusters) {
            result.add(distanceEuclidean(eachCluster.getCenter()));
        }
        return result;
    }

    @Override
    public String toString() {
        String result = "ID:" + getId() + "---";
        for (String eachKey : values.keySet()) {
            result += "|" + eachKey + ":" + values.get(eachKey);
        }
        return result;
    }

    public Map getValues() {
        return values;
    }

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }
}