public Centroid(Centroid c)
{
// perform deep copy
this.name = new StringBuilder(c.getName());
this.vectorCnt = c.getVectorCnt();
this.centroidVector = new Dictionary <string, double>(c.getCentroidVector());
this.length = c.getLength();
}
static public double similarity(Centroid a, Centroid b)
{
Dictionary <string, double> vectorA = a.getCentroidVector();
Dictionary <string, double> vectorB = b.getCentroidVector();
double lengthA = a.getLength();
double lengthB = b.getLength();
double dotproduct = 0.0;
// compute dot product of vectors A & B
foreach (KeyValuePair <string, double> kvp in vectorA)
{
// if both vectors have the key
if (vectorB.ContainsKey(kvp.Key))
{
dotproduct += (kvp.Value * vectorB[kvp.Key]);
}
}
return(dotproduct / (lengthA * lengthB));
}
