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cluster.cpp
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cluster.cpp
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/**
* @file cluster.cpp
* @brief Implementation of methods for Cluster class
*
* This file contains the implementations of the calcCentroid and
* calcMaxDistance methods.
* calcCentroid assigns the cluster centroid and the cluster radius.
* The centroid is defined as the element whose max distances to any
* other member is the smallest.
* calcMaxDistance calculates the maximum distance between any two two
* members of the cluster.
*/
#include "node.h"
#include "cluster.h"
#include <iostream>
#include <fstream>
void Cluster::calcCentroid(vector< vector<float> > normScores)
{
float distToNeighbors;
float minDistanceSum;
float currentRadius;
for (int i=0;i<members_.size();i++)
{
distToNeighbors=0;
currentRadius=0;
for (int j=0;j<members_.size();j++)
{
float d;
d = normScores[members_[i]->getID()][members_[j]->getID()];
//if (i!=j) {distToNeighbors += d;};
currentRadius = (d > currentRadius) ? d : currentRadius;
}
if (i==0)
{
minDistanceSum=currentRadius;
radius_=currentRadius;
}
//if (distToNeighbors<minDistanceSum)
if (currentRadius<minDistanceSum)
{
//minDistanceSum=distToNeighbors;
minDistanceSum=currentRadius;
centroid_=members_[i];
radius_=currentRadius;
}
}
}
void Cluster::calcMaxDistance(vector< vector<float> > normScores)
{
float maxDistance=0;
float d;
for (int i=0;i<members_.size();i++)
{
for (int j=0;j<members_.size();j++)
{
d=normScores[members_[i]->getID()][members_[j]->getID()];
maxDistance = d > maxDistance ? d : maxDistance;
}
}
maxDistance_=maxDistance;
}