public void CalculateCosineDistanceBetweenDifferentVectors()
{
double[] vector1 = new double[3];
vector1[0] = 1;
vector1[1] = 2;
vector1[2] = 3;
double[] vector2 = new double[3];
vector2[0] = 7;
vector2[1] = 8;
vector2[2] = 9;
double distance = DistanceCalculator.CalculateCosineSimilarity(vector1, vector2);
Assert.True(Math.Abs(distance - 0.9594119) <= TOLERANCE);
}
// GET: Sentences/Related/Id
public async Task <IActionResult> Related(Guid Id)
{
if (!ModelState.IsValid)
{
return(NotFound());
}
var _sent = await _context.Sentences
.SingleOrDefaultAsync(s => s.Id == Id &&
s.Type == SentenceType.OBJECTIVE &&
s.InferSentVectorsString != null);
if (_sent == null)
{
return(NotFound());
}
var inferSentVector = _sent.InferSentVectorsDouble;
var relatedSentencesQuery = _context.Sentences
.Where(candidate => candidate.InferSentVectorsString != null && candidate.Id != Id && candidate.TextEntryId != _sent.TextEntryId)
.Select(candidate => new
{
sentence = candidate,
distance = DistanceCalculator.CalculateCosineSimilarity(
_sent.InferSentVectorsDouble,
candidate.InferSentVectorsDouble) // distance = 1 if the two sentences are the same
})
.Where(_sentence => _sentence.distance <1.0 && _sentence.distance> 0.7)
.OrderByDescending(candidate => candidate.distance)
.Take(5)
.Select(_sentence => _sentence.sentence);
List <Sentence> relatedSentences = await relatedSentencesQuery.ToListAsync();
return(Json(new
{
Sentences = relatedSentences.Select(
sent => new SentenceViewModel(sent)),
SentenceId = Id
}));
}