MutationHillClimber.java

package bsearch.algorithms;

import java.util.HashMap;


public strictfp class MutationHillClimber extends SimulatedAnnealing {

	public MutationHillClimber()
	{
	}

	public String getName() {
		return "MutationHillClimber";
	}
	public String getDescription() {
		return "A random mutation hill climber starts at a random location in the search space, and repeatedly tries mutating its location and moving if it improves fitness.  Sometimes called a stochastic hill climber, and also very similar to a 1+1 evolutionary strategy";
	}

	public void setSearchParams( HashMap<String , String> searchMethodParams ) throws SearchParameterException
	{
		HashMap<String,String> params = new HashMap<String,String>(searchMethodParams);
		params.put("initial-temperature", "0.0");
		params.put("temperature-change-factor", "0.0");
		super.setSearchParams(params);
	}
	public HashMap<String , String> getSearchParams()
	{
		HashMap<String,String> params = super.getSearchParams();
		params.remove("initial-temperature");
		params.remove("temperature-change-factor");
		return params;
	}
	public HashMap<String , String> getSearchParamsHelp()
	{
		HashMap<String,String> params = new HashMap<String,String>();
		params.put("mutation-rate", "controls how much mutation occurs when choosing a new location to try to climb uphill");
		params.put("restart-after-stall-count", "if it can't find an uphill location after X attempts, jump to a random location in the search space and start climbing again.");
		return params;
	}


}