public static void Test()
{
HashSet <String> set1 = new HashSet <String>();
set1.Add("FRANCISCO");
set1.Add("MISSION");
set1.Add("SAN");
HashSet <String> set2 = new HashSet <String>();
set2.Add("SAN");
set2.Add("FRANCISCO");
set2.Add("MISSION");
set2.Add("USA");
MinHash minHash = new MinHash(set1.Count + set2.Count);
Console.Out.WriteLine(minHash.Similarity(set1, set2));
}
public int FindClosest(int setIndex, MinHash minHasher)
{
//First find potential "close" candidates
HashSet <int> potentialSetIndexes = new HashSet <int>();
for (int b = 0; b < m_numBands; b++)
{
//combine all 5 MH values and then hash get its hashcode
int sum = 0;
for (int i = 0; i < ROWSINBAND; i++)
{
sum += m_minHashMatrix[setIndex, b *ROWSINBAND + i];
}
foreach (var i in m_lshBuckets[sum])
{
potentialSetIndexes.Add(i);
}
}
//From the candidates compute similarity using min-hash and find the index of the closet set
int minIndex = -1;
double similarityOfMinIndex = 0.0;
foreach (int candidateIndex in potentialSetIndexes.Where(i => i != setIndex))
{
// TODO: FIX this
//double similarity = minHasher.ComputeSimilarity(m_minHashMatrix, setIndex, candidateIndex);
//double similarity = minHasher.Similarity(m_minHashMatrix, setIndex, candidateIndex);
double similarity = 0.0;
if (similarity > similarityOfMinIndex)
{
similarityOfMinIndex = similarity;
minIndex = candidateIndex;
}
}
return(minIndex);
}
