public void VectorSquaredEuclideanDistance()
{
var distribution = new Normal(0, 5);
var a = _cpu.CreateVector(5000, i => Convert.ToSingle(distribution.Sample())).AsIndexable();
var b = _cpu.CreateVector(5000, i => Convert.ToSingle(distribution.Sample())).AsIndexable();
var distance = a.SquaredEuclidean(b);
float distance2;
using (var gpuA = _cuda.CreateVector(a))
using (var gpuB = _cuda.CreateVector(b))
distance2 = gpuA.SquaredEuclidean(gpuB);
Assert.IsTrue(FloatingPointHelper.AlmostEqual2sComplement(distance, distance2, 11));
}
public void VectorCosineDistance()
{
var rand = new Random(0);
var a = _cpu.CreateVector(5000, i => Convert.ToSingle(rand.NextDouble())).AsIndexable();
var b = _cpu.CreateVector(5000, i => Convert.ToSingle(rand.NextDouble())).AsIndexable();
var distance = a.CosineDistance(b);
float distance2;
using (var gpuA = _cuda.CreateVector(a))
using (var gpuB = _cuda.CreateVector(b))
distance2 = gpuA.CosineDistance(gpuB);
Assert.IsTrue(FloatingPointHelper.AlmostEqual2sComplement(distance, distance2, 10));
}
public void VectorMeanSquaredDistance()
{
Load();
var distribution = new Normal(0, 5);
var a = _cpu.CreateVector(5000, i => Convert.ToSingle(distribution.Sample())).AsIndexable();
var b = _cpu.CreateVector(5000, i => Convert.ToSingle(distribution.Sample())).AsIndexable();
var distance = a.MeanSquaredDistance(b);
float distance2;
using (var gpuA = _cuda.CreateVector(a))
{
using var gpuB = _cuda.CreateVector(b);
distance2 = gpuA.MeanSquaredDistance(gpuB);
}
Assert.IsTrue(FloatingPointHelper.AlmostEqual2sComplement(distance, distance2, 11));
Cleanup();
}