public bool Update(IReadOnlyList <IVector> data)
{
// check if the cluster has been updated
if (data.Count == _data.Count)
{
var isChanged = false;
var existing = new HashSet <IVector>(_data);
foreach (var item in data)
{
if (!existing.Contains(item))
{
isChanged = true;
break;
}
}
if (!isChanged)
{
return(false);
}
}
Current.Dispose();
Current = null;
_data.Clear();
var denominator = 1f / data.Count;
var isFirst = true;
foreach (var item in data)
{
if (Current == null)
{
Current = item.Clone();
}
else
{
Current.AddInPlace(item, isFirst ? denominator : 1, denominator);
isFirst = false;
}
_data.Add(item);
}
return(true);
}