/// <summary>
/// Gets a new Decision Vector whose elements have potentially been mutated.
/// </summary>
/// <param name="decisionVector">The existing Decision Vector.</param>
/// <returns>A new Decision Vector.</returns>
/// <exception cref="ArgumentException">Thrown when the Decision Vector has less than 2 elements.</exception>
public DecisionVector Operate(DecisionVector decisionVector)
{
if (decisionVector.Count < 2)
{
throw new ArgumentException("Decision Vector must more than one element.",
nameof(decisionVector));
}
if (rngManager.Rng.NextDouble() >= mutationProbability)
{
return(decisionVector);
}
var locationsToSwap = rngManager.GetLocations(
decisionVector.Count, 2, false, 1);
// New vector - swap elements
var vector = decisionVector.ToList();
var firstItem = vector.ElementAt(locationsToSwap.ElementAt(0));
var secondItem = vector.ElementAt(locationsToSwap.ElementAt(1));
vector.RemoveAt(locationsToSwap.ElementAt(0));
vector.Insert(locationsToSwap.ElementAt(0), secondItem);
vector.RemoveAt(locationsToSwap.ElementAt(1));
vector.Insert(locationsToSwap.ElementAt(1), firstItem);
// Assumption, we are swapping the values of the items, not the actual dimensions.
return(DecisionVector.CreateFromArray(
decisionVector.GetDecisionSpace(),
vector));
}