private bool Assign()
{
var numClusters = _clusters.Count;
var isChanged = false;
var distances = new double[numClusters];
foreach (var t in _items)
{
for (var k = 0; k < numClusters; k++)
{
distances[k] = _metric.Distance(t, _clusters[k].Centroid);
}
var newClusterId = _metric.MinIndex(distances);
if (newClusterId == t.ClusterId)
{
continue;
}
isChanged = true;
t.SetCluster(newClusterId);
}
return(isChanged);
}