public static void Main(string[] args)
{
/*
* The context of this tutorial is that you have an existing time stepping simulation
* model.
*/
IClonableObjectiveEvaluator <IHyperCube <double> > evaluator;
IEvolutionEngine <IHyperCube <double> > uniformRandomSampling;
var simulation = SimulationFactory.CreateAwbmSimulation();
var data = DataHandling.GetSampleClimate();
SimulationFactory.SetSampleSimulation(simulation, data);
int from = simulation.GetStart();
int to = simulation.GetEnd();
evaluator = BuildUrsEvaluator(simulation, data.Runoff, from, to);
var paramSpace = CreateFeasibleAwbmParameterSpace(simulation);
uniformRandomSampling = new UniformRandomSampling <IHyperCube <double> >(evaluator, new BasicRngFactory(0), paramSpace, 3000);
var ursResults = uniformRandomSampling.Evolve();
Console.WriteLine(MetaheuristicsHelper.GetHumanReadable(ursResults));
}
static void Main(string[] args)
{
/*
* This program primarily demonstrates how to wrap and calibrate a model written
* in a native language. While technological aspects of what it demonstrates
* are not inherently limited nor specific to optimisation, this is
* a use case often encountered (e.g. to calibrate existing models written in
* C++ , C, or Fortran)
*/
IClonableObjectiveEvaluator <IHyperCube <double> > evaluator;
IEvolutionEngine <IHyperCube <double> > uniformRandomSampling;
NativeModelWrapper.AwbmWrapper.PermitMultiThreading = true;
using (var simulation = new AwbmWrapper())
{
var data = DataHandling.GetSampleClimate();
SimulationFactory.SetSampleSimulation(simulation, data);
int from = simulation.GetStart();
int to = simulation.GetEnd();
evaluator = AWBM_URS.MainClass.BuildUrsEvaluator(simulation, data.Runoff, from, to);
var paramSpace = AWBM_URS.MainClass.CreateFeasibleAwbmParameterSpace(simulation);
uniformRandomSampling = new UniformRandomSampling <IHyperCube <double> >(evaluator, new BasicRngFactory(0), paramSpace, 3000);
var ursResults = uniformRandomSampling.Evolve();
Console.WriteLine(MetaheuristicsHelper.GetHumanReadable(ursResults));
}
}
protected override void Convert(System.IO.TextWriter writer, object state)
{
LoggingEvent logEvent = state as LoggingEvent;
SysConfigLogInfo sysConfig = logEvent.MessageObject as SysConfigLogInfo;
if (sysConfig == null)
{
throw new ArgumentException("Object is not of type SysConfigLogInfo");
}
Tuple <string, string>[] prepend = new Tuple <string, string>[]
{
Tuple.Create("Category", sysConfig.Tags["Category"])
};
//prepend = null; // Not sure how to prevent repeats reliably.
IEnumerable <IHyperCube <double> > points = sysConfig.Scores as IEnumerable <IHyperCube <double> >;
IEnumerable <IObjectiveScores> scores = sysConfig.Scores as IEnumerable <IObjectiveScores>;
if (points != null)
{
writer.Write(MetaheuristicsHelper.BuildCsvFileContent <IHyperCube <double> >(points, false, prepend));
}
if (scores != null)
{
writer.Write(MetaheuristicsHelper.BuildCsvFileContent <IHyperCube <double> >(scores, false, prepend));
}
}
public void TestPopulationSeeding()
{
var fTmp = Path.GetTempFileName();
var f = Path.Combine(Path.GetDirectoryName(fTmp), Path.GetFileNameWithoutExtension(fTmp) + ".csv");
int numScores = 5;
var pSet = new ParameterSet(new MockTimeModel());
var expectedMaxBound = 3.0;
pSet.paramSpec("x").max = expectedMaxBound;
var pSpaceReference = new MpiSysConfigTIME(pSet);
IObjectiveScores[] scores = createScores(numScores);
try
{
MetaheuristicsHelper.SaveAsCsv <MpiSysConfig>(scores, f);
var seeds = GridModelHelper.LoadParameterSets(f, pSpaceReference);
Assert.AreEqual(numScores, seeds.Length);
Assert.AreEqual(expectedMaxBound, seeds[0].GetMaxValue("x"));
Assert.AreEqual(MockTimeModel.getX(4), seeds[4].GetValue("x"), 1e-9);
Assert.AreEqual(MockTimeModel.getY(3), seeds[3].GetValue("y"), 1e-9);
}
finally
{
if (File.Exists(f))
{
File.Delete(f);
}
if (File.Exists(fTmp))
{
File.Delete(fTmp);
}
}
}
public IObjectiveScores <IHyperCube <double> > EvaluateScore(IHyperCube <double> systemConfiguration)
{
apply(systemConfiguration, simulation);
simulation.Execute();
double result = sumSquares(simulation.GetRecorded("Runoff"), this.observedData);
return(MetaheuristicsHelper.CreateSingleObjective(systemConfiguration, result, "Sum Squares"));
}
protected void SetValue(string variableName, T value, bool throwOnOutOfBounds)
{
checkCorrectArg(variableName);
T maxValue = GetMaxValue(variableName);
T minValue = GetMinValue(variableName);
if (throwOnOutOfBounds)
{
MetaheuristicsHelper.CheckInBounds(value, minValue, maxValue, throwOnOutOfBounds);
}
this.values[variableName].Val = value;
}
/// <summary>
/// Writes the results.
/// </summary>
public void WriteResults()
{
Log.InfoFormat("Writing in-memory log to '{0}'", LogFileName);
InMemoryLogger.CsvSerialise(LogFileName, "GriddedCalib");
Log.InfoFormat("Root: saving final parameters to '{0}'", OutputFileName);
MetaheuristicsHelper.SaveAsCsv <MpiSysConfig>(Results, OutputFileName);
string parameterSetPath = Path.Combine(OutputPath.FullName, "BestParamSet.xml");
Log.InfoFormat("Root: saving reseed parameters to '{0}'", parameterSetPath);
GridModelHelper.WriteParameters <MpiSysConfig>(Results, SeedParametersFile, parameterSetPath);
}
public void TestParseCsvScores()
{
var template = createPoint(3, 2, 1);
var csvContent = @"0,1,2,Score:0-0,Score:0-1
4.4,3.3,2.2,0,3.14159265358979
4.5,3.4,2.1,3.14159265358979,6.28318530717959
";
var points = MetaheuristicsHelper.ParseConfigsFromCsv(csvContent, template);
Assert.AreEqual(4.4, points[0].GetValue("0"));
Assert.AreEqual(3.3, points[0].GetValue("1"));
Assert.AreEqual(3.4, points[1].GetValue("1"));
}
private void GetSmallestIntervalForValues(IHyperCube <double>[] points, string varName, out double minimum, out double maximum)
{
int n = points.Length;
double[] values = new double[n];
for (int j = 0; j < n; j++)
{
values[j] = points[j].GetValue(varName);
}
minimum = MetaheuristicsHelper.GetMinimum(values);
maximum = MetaheuristicsHelper.GetMaximum(values);
}
public void TestMakeBins()
{
int[] population = new int[13];
for (int i = 0; i < population.Length; i++)
{
population[i] = i + 1;
}
var result = MetaheuristicsHelper.MakeBins(population, 2);
Assert.AreEqual(2, result.Length);
Assert.AreEqual(new[] { 1, 2, 3, 4, 5, 6, 7 }, result[0]);
Assert.AreEqual(new[] { 8, 9, 10, 11, 12, 13 }, result[1]);
}
public void TestInterpolator()
{
var evaluator = new IdentityObjEval();
var inPoints = new List <TestHyperCube>();
inPoints.Add(createPoint(1.0, 2.0, 3.0));
inPoints.Add(createPoint(1.0, 2.0, 4.0));
inPoints.Add(createPoint(2.0, 3.0, 5.0));
var inScores = Array.ConvertAll(inPoints.ToArray(), (x => evaluator.EvaluateScore(x)));
var outPoints = MetaheuristicsHelper.InterpolateBetweenPoints <TestHyperCube>(evaluator, inScores, 0.1 + 1e-11);
Assert.AreEqual(21, outPoints.Length);
assertPoint(outPoints[0], 1.0, 2.0, 3.0);
assertPoint(outPoints[1], 1.0, 2.0, 3.1);
assertPoint(outPoints[10], 1.0, 2.0, 4.0);
assertPoint(outPoints[15], 1.5, 2.5, 4.5);
}
protected void performHomoteticTransform(IHyperCube <T> point, T factor, ref HyperCube <T> result)
{
foreach (var varName in this.GetVariableNames())
{
var min = this.GetMinValue(varName);
var max = this.GetMaxValue(varName);
result.SetMinValue(varName, min);
result.SetMaxValue(varName, max);
var newVal = reflect(point.GetValue(varName), this.GetValue(varName), factor);
var isInBounds = MetaheuristicsHelper.CheckInBounds(newVal, min, max, throwIfFalse: this.ThrowOnOutOfBounds);
if (!isInBounds)
{
result = null;
break;
}
result.SetValue(varName, newVal);
}
}
public static void Main(string[] args)
{
// If you have to remember *one* thing from this tutorial, it is the three essential players
// 1- the tunable parameters of the optimisation problem:
// ISystemConfiguration, here implemented by StringSpecification for this 'Hello World' problem
// 2- the object evaluating the score(s) for a given "system configuration" (IObjectiveEvaluator<T>)
// 3- the optimisation algorithm, implementing IEvolutionEngine<T>
// It is recommended that you declare variables typed as interfaces, not concrete classes,
// whenever possible including in an 'Hello World'...
IObjectiveEvaluator <StringSpecification> evaluator;
IEvolutionEngine <StringSpecification> finder;
string strToFind = args.Length == 0 ? "Hello, World!" : args[0];
evaluator = buildEvaluator(strToFind);
finder = new StringFinder(evaluator, strToFind.Length, new BasicRngFactory(0));
var result = finder.Evolve();
Console.WriteLine(MetaheuristicsHelper.GetHumanReadable(result));
}
internal static MpiSysConfig[] LoadParameterSets(string filename, MpiSysConfigTIME templateParameterSet)
{
var ext = Path.GetExtension(filename).ToLower();
if (ext == ".xml")
{
var pSets = SerializationHelper.XmlDeserialize <ParameterSet[]>(filename, new[] { typeof(ParameterSet) });
var result = new MpiSysConfig[pSets.Length];
for (int i = 0; i < result.Length; i++)
{
var p = new MpiSysConfigTIME(templateParameterSet);
p.CopyValuesFrom(pSets[i]);
result[i] = p;
}
return(result);
}
else if (ext == ".csv")
{
return(MetaheuristicsHelper.ReadConfigsFromCsv(filename, templateParameterSet));
}
throw new NotImplementedException();
}
public static IObjectiveScores[] EvaluateScores <T>(IClonableObjectiveEvaluator <T> evaluator, T[] population, Func <bool> isCancelled, ParallelOptions parallelOptions = null) where T : ISystemConfiguration
{
if (population.Length == 0)
{
return(new IObjectiveScores[0]);
}
if (parallelOptions == null)
{
parallelOptions = new ParallelOptions()
{
MaxDegreeOfParallelism = -1
}
}
;
var procCount = System.Environment.ProcessorCount;
IObjectiveScores[] result;
if (evaluator.SupportsThreadSafeCloning)
{
// There is presumably no point cloning
// the system more times than the max level of parallelism
int nParallel = procCount;
if (parallelOptions.MaxDegreeOfParallelism > 0)
{
nParallel = Math.Min(nParallel, parallelOptions.MaxDegreeOfParallelism);
}
T[][] subPop = MetaheuristicsHelper.MakeBins(population, nParallel);
var taskPkgs = new List <Tuple <T[], IClonableObjectiveEvaluator <T> > >();
taskPkgs.Add(Tuple.Create(subPop[0], evaluator));
for (int i = 1; i < subPop.Length; i++)
{
taskPkgs.Add(Tuple.Create(subPop[i], evaluator.Clone()));
}
// Need to use Parallel.ForEach rather than Parallel.For to work around a Parallel.For
// oddity in Mono 3.12.1. Need an identity to iterate over...
var ramp = new int[subPop.Length];
// Map of index of subpopulations to indices in the variable result:
//var offsets = new int[subPop.Length];
var resultBins = new IObjectiveScores[ramp.Length][];
for (int i = 1; i < ramp.Length; i++)
{
ramp[i] = i;
}
Parallel.ForEach(ramp, parallelOptions,
(i => {
resultBins[i] = EvaluateScoresSerial(taskPkgs[i], isCancelled);
})
);
result = Gather(resultBins);
}
else
{
result = new IObjectiveScores[population.Length];
for (int i = 0; i < population.Length; i++)
{
if (!isCancelled())
{
result [i] = evaluator.EvaluateScore(population [i]);
}
else
{
result [i] = null;
}
}
}
return(result);
}
public IObjectiveScores <T> EvalParaboloidScore <T>(T sysConfig, double bestParam) where T : IHyperCube <double>
{
double result = CalculateParaboloid(sysConfig, bestParam);
return(MetaheuristicsHelper.CreateSingleObjective <T>(sysConfig, result, "Paraboloid"));
}
