/// <summary>
/// Generate the nearest neighbour list.
/// </summary>
/// <returns></returns>
public SortedNearestNeighbours GetNearestNeighboursBackward(float weight, int id)
{
if (_backwardSortedNearestNeighbours == null)
{ // not there yet, create.
_backwardSortedNearestNeighbours = new Dictionary <float, SortedNearestNeighbours[]>();
}
SortedNearestNeighbours[] nearestNeighbours = null;
if (!_backwardSortedNearestNeighbours.TryGetValue(weight, out nearestNeighbours))
{ // not found for n, create.
nearestNeighbours = new SortedNearestNeighbours[this.Times.Length];
_backwardSortedNearestNeighbours.Add(weight, nearestNeighbours);
}
var result = nearestNeighbours[id];
if (result == null)
{ // not found, calculate.
result = SortedNearestNeighbours.BackwardDirected(this.Times, weight, id);
nearestNeighbours[id] = result;
}
return(result);
}
/// <summary>
/// Generate the nearest neighbour list.
/// </summary>
/// <returns></returns>
public SortedNearestNeighbours GetNearestNeighboursForward(float weight, int customer)
{
if (_forwardSortedNearestNeighbours == null)
{ // not there yet, create.
_forwardSortedNearestNeighbours = new Dictionary <float, SortedNearestNeighbours[]>();
}
SortedNearestNeighbours[] nearestNeighbours = null;
if (!_forwardSortedNearestNeighbours.TryGetValue(weight, out nearestNeighbours))
{ // not found for n, create.
nearestNeighbours = new SortedNearestNeighbours[this.Weights.Length];
_forwardSortedNearestNeighbours.Add(weight, nearestNeighbours);
}
var result = nearestNeighbours[customer];
if (result == null)
{ // not found, calculate.
result = SortedNearestNeighbours.Forward(this.Weights, weight, customer);
nearestNeighbours[customer] = result;
}
return(result);
}
