/// <summary>
/// Gets specified centre.
/// </summary>
public List <IReadOnlyList <double> > GetCentre(ECentreMode mode, ECandidateMode iMode)
{
List <IReadOnlyList <double> > centre = new List <IReadOnlyList <double> >();
this.GetCentre(mode, iMode, centre);
return(centre);
}
/// <summary>
/// Calculates cluster centre.
/// </summary>
private void GetCentre(ECentreMode mode, ECandidateMode iMode, List <IReadOnlyList <double> > centres)
{
centres.Clear();
IEnumerable <IReadOnlyList <double> > list;
int listCount;
switch (iMode)
{
case ECandidateMode.Exemplars:
list = this.Exemplars;
listCount = this.Exemplars.Count;
break;
case ECandidateMode.Assignments:
list = this.Assignments.Vectors.Select(z => z.Values);
listCount = this.Assignments.List.Count;
break;
default:
throw new InvalidOperationException("Invalid switch. 9B5EF96B-53F3-4651-AF7D-60B27475C7B5");
}
if (list.IsEmpty()) // check this function
{
return;
}
switch (mode)
{
case ECentreMode.All:
//////////////////
// ALL EXEMPLARS
{
foreach (IReadOnlyList <double> e in list)
{
centres.Add(e);
}
}
break;
case ECentreMode.Average:
////////////////////////////
// AVERGE OF ALL EXEMPLARS
{
int numPoints = list.First().Count;
double[] centre = new double[numPoints];
for (int o = 0; o < numPoints; o++)
{
double total = 0;
foreach (IReadOnlyList <double> v in list)
{
total += v[o];
}
centre[o] = total / listCount;
}
centres.Add(centre);
}
break;
}
}
/// <summary>
/// Calculates cluster centre.
/// </summary>
public void SetCentre(ECentreMode mode, ECandidateMode iMode)
{
this.GetCentre(mode, iMode, this.Centres);
}
