virtual public void InitializePopulation()
{
d_population.Clear();
Optimization.Storage.Records.InitialPopulation initial = d_storage.ReadInitialPopulation();
// Create initial population
for (uint idx = 0; idx < d_settings.PopulationSize; ++idx)
{
// Create new solution
Solution solution = CreateSolution(idx);
// Set solution parameter template
solution.Parameters = d_parameters;
// Resetting the solution randomly initializes its parameters
solution.Reset();
if (initial != null)
{
// Initialize solution from the specified initial population
SolutionFromInitial(solution, initial);
}
Add(solution);
}
foreach (Extension ext in d_extensions)
{
ext.InitializePopulation();
}
}
private void SolutionFromInitial(Solution solution, Optimization.Storage.Records.InitialPopulation population)
{
int idx = (int)System.Math.Round(State.Random.NextDouble() * (population.Population.Count - 1));
Optimization.Storage.Records.InitialSolution sol = population.Population[idx];
foreach (Parameter parameter in solution.Parameters)
{
// skip parameters that are not in the initial database
if (!sol.Parameters.ContainsKey(parameter.Name))
{
continue;
}
double val = sol.Parameters[parameter.Name];
if (d_settings.InitialPopulationNoise > 0)
{
val += (State.Random.NextDouble() * 2 - 1) * d_settings.InitialPopulationNoise * (parameter.Boundary.Max - parameter.Boundary.Min);
val = System.Math.Max(System.Math.Min(val, parameter.Boundary.Max), parameter.Boundary.Min);
}
parameter.Value = val;
}
foreach (KeyValuePair <string, string> pair in sol.Data)
{
solution.Data[pair.Key] = pair.Value;
}
}