public void computing_distance_between_users()
{
RecoContext c = new RecoContext();
c.LoadFrom(_goodDataPath);
double d = c.DistanceNorm2(c.Users[13], c.Users[89]);
}
public void computing_the_distance_between_2_users()
{
RecoContext c = new RecoContext();
c.LoadFrom(_goodDataPath);
const int part = 10;
for (int i = 0; i < c.Users.Length / part; i++)
{
var u1 = c.Users[i];
Assert.That(c.DistanceNorm2(u1, u1), Is.EqualTo(0));
for (int j = i + 1; j < c.Users.Length / part; j++)
{
var u2 = c.Users[j];
Assert.That(c.DistanceNorm2(u1, u2), Is.EqualTo(c.DistanceNorm2(u2, u1)));
}
}
}
