private static void Compare(string first, string second, ITextModel model)
{
var baseVectorComponents = new List <float>(model.VectorWidth);
var baseVectors = new List <IVector>();
for (int i = 0; i < model.VectorWidth; i++)
{
baseVectorComponents.Add(i == 0 ? 1 : Convert.ToSingle(Math.Log10(i)));
var bvecs = new List <float>(model.VectorWidth);
for (int y = 0; y < model.VectorWidth; y++)
{
float value;
if (y == i)
{
value = 1;
}
else
{
value = 0;
}
bvecs.Add(value);
}
baseVectors.Add(new IndexedVector(bvecs));
}
var bvector = new IndexedVector(baseVectorComponents);
var doc1 = new VectorNode(model.Tokenize(first).First());
var doc2 = new VectorNode(model.Tokenize(second).First());
var angles1 = new List <float>();
var angles2 = new List <float>();
foreach (var bvec in baseVectors)
{
angles1.Add(Convert.ToSingle(model.CosAngle(doc1.Vector, bvec)));
angles2.Add(Convert.ToSingle(model.CosAngle(doc2.Vector, bvec)));
}
var docVector1 = new IndexedVector(angles1);
var docVector2 = new IndexedVector(angles2);
var angle = model.CosAngle(docVector1, docVector2);
var angle1 = model.CosAngle(docVector1, bvector);
var angle2 = model.CosAngle(docVector2, bvector);
Console.WriteLine($"similarity: {angle}");
Console.WriteLine($"bvector similarity 1: {angle1}");
Console.WriteLine($"bvector similarity 2: {angle2}");
Console.WriteLine($"base vector similarity: {Math.Min(angle1, angle2) / Math.Max(angle1, angle2)}");
}
private static void CompareBaseless(string first, string second, ITextModel model)
{
var doc1 = new VectorNode(model.Tokenize(first).First());
var doc2 = new VectorNode(model.Tokenize(second).First());
var angle = model.CosAngle(doc1.Vector, doc2.Vector);
Console.WriteLine($"similarity (baseless): {angle}");
}