public void SetDistribution(
RandomVariable variable,
IDictionary<string, string> variableAbbreviations,
IEnumerable<RandomVariable> variableParents,
DiscreteDistribution distribution)
{
_variable = variable;
_variableParents = variableParents;
_variableAbbreviations = variableAbbreviations;
if (variable != null)
{
if (distribution != null)
{
_distributions = new DistributionSet(distribution);
}
else
{
_distributions = variable.Distributions;
}
}
else
{
_distributions = new DistributionSet();
}
RefreshUI();
}
public DateDraw()
{
_dayOfWeek = new DiscreteDistribution <DayOfWeek>();
_months = new DiscreteDistribution <int>();
_hours = new DiscreteDistribution <int>();
InitDays();
InitMonths();
InitHours();
}
internal TestResult(
string discreteName, int discreteValue, DiscreteDistribution discreteDistribution,
string continuousName, double continuousValue, ContinuousDistribution continuousDistribution,
TestType type)
{
this.discreteStatistic = new DiscreteTestStatistic(discreteName, discreteValue, discreteDistribution);
this.continuousStatistic = new ContinuousTestStatistic(continuousName, continuousValue, continuousDistribution);
this.type = type;
}
/**
* <summary> The predict method takes an {@link Instance} as an input and loops through the {@link ArrayList} of {@link DecisionTree}s.
* Makes prediction for the items of that ArrayList and returns the maximum item of that ArrayList.</summary>
*
* <param name="instance">Instance to make prediction.</param>
* <returns>The maximum prediction of a given Instance.</returns>
*/
public override string Predict(Instance.Instance instance)
{
var distribution = new DiscreteDistribution();
foreach (var tree in _forest)
{
distribution.AddItem(tree.Predict(instance));
}
return(distribution.GetMaxItem());
}
private DiscreteDistribution GetMutationTypeDistribution(NeatGenome <T> parent)
{
// If there is only one connection then avoid destructive mutations to avoid the
// creation of genomes with no connections.
DiscreteDistribution dist = (parent.ConnectionGenes.Length < 2) ?
_mutationTypeDistributionsCurrent.MutationTypeDistributionNonDestructive
: _mutationTypeDistributionsCurrent.MutationTypeDistribution;
return(dist);
}
/**
* <summary> The classDistribution method returns the distribution of all the class labels of instances.</summary>
*
* <returns>Distribution of the class labels.</returns>
*/
public DiscreteDistribution ClassDistribution()
{
var distribution = new DiscreteDistribution();
foreach (var instance in _list)
{
distribution.AddItem(instance.GetClassLabel());
}
return(distribution);
}
public void Setup()
{
smallDistribution = new DiscreteDistribution();
smallDistribution.AddItem("item1");
smallDistribution.AddItem("item2");
smallDistribution.AddItem("item3");
smallDistribution.AddItem("item1");
smallDistribution.AddItem("item2");
smallDistribution.AddItem("item1");
}
public override Dictionary <string, double> PredictProbability(Instance.Instance instance)
{
var distribution = new DiscreteDistribution();
foreach (var tree in _forest)
{
distribution.AddItem(tree.Predict(instance));
}
return(distribution.GetProbabilityDistribution());
}
public void Run_DefaultModelAndObservagtions_TrainedModel()
{
var startDistribution = new[] { 0.85, 0.15 };
// s = 0, t = 1
var tpm = new double[2][];
tpm[0] = new[] { 0.3, 0.7 };
tpm[1] = new[] { 0.1, 0.9 };
var observations = new List <IObservation>
{
new Observation(new double[] { 0 }, "A"),
new Observation(new double[] { 1 }, "B"),
new Observation(new double[] { 1 }, "B"),
new Observation(new double[] { 0 }, "A")
};
var emissions = new DiscreteDistribution[2];
emissions[0] = new DiscreteDistribution(new double[] { 0, 1 }, new[] { 0.4, 0.6 });
emissions[1] = new DiscreteDistribution(new double[] { 0, 1 }, new[] { 0.5, 0.5 });
var symbols = new List <IObservation> {
new Observation(new double[] { 0 }, "A"), new Observation(new double[] { 1 }, "B")
};
var model = HiddenMarkovModelFactory.GetModel(new ModelCreationParameters <DiscreteDistribution>()
{
Pi = startDistribution, TransitionProbabilityMatrix = tpm, Emissions = emissions
}); //new HiddenMarkovModel(startDistribution, tpm, emissions) { LogNormalized = false };
model.Normalized = false;
var algo = new BaumWelch(observations, model, symbols);
var res = algo.Run(100, LikelihoodTolerance);
Assert.AreEqual(0.8258482510939813, res.Pi[0]);
Assert.AreEqual(0.17415174890601867, res.Pi[1]);
Assert.AreEqual(0.330050127737348, res.TransitionProbabilityMatrix[0][0]);
Assert.AreEqual(0.669949872262652, res.TransitionProbabilityMatrix[0][1]);
Assert.AreEqual(0.098712289730350428, res.TransitionProbabilityMatrix[1][0]);
Assert.AreEqual(0.90128771026964949, res.TransitionProbabilityMatrix[1][1]);
Assert.AreEqual(0.65845050146912831, res.Emission[0].ProbabilityMassFunction(0));
Assert.AreEqual(0.34154949853087169, res.Emission[0].ProbabilityMassFunction(1));
Assert.AreEqual(0.4122484947955643, res.Emission[1].ProbabilityMassFunction(0));
Assert.AreEqual(0.58775150520443575, res.Emission[1].ProbabilityMassFunction(1));
Assert.AreEqual(0.0770055392812707, res.Likelihood);
Assert.AreEqual(1d, res.Pi.Sum());
Assert.AreEqual(1d, res.TransitionProbabilityMatrix[0].Sum());
Assert.AreEqual(1d, Math.Round(res.TransitionProbabilityMatrix[1].Sum(), 5));
Assert.AreEqual(1d, res.Emission[0].ProbabilityMassFunction(0) + res.Emission[0].ProbabilityMassFunction(1));
Assert.AreEqual(1d, res.Emission[1].ProbabilityMassFunction(0) + res.Emission[1].ProbabilityMassFunction(1));
}
public void Run_DefaultModelAndObservagtionsAndNormalized_TrainedMode()
{
var startDistribution = new[] { 0.85, 0.15 };
var tpm = new double[2][];
tpm[0] = new[] { 0.3, 0.7 };
tpm[1] = new[] { 0.1, 0.9 };
var observations = new List <IObservation>
{
new Observation(new double[] { 0 }, "A"),
new Observation(new double[] { 1 }, "B"),
new Observation(new double[] { 1 }, "B"),
new Observation(new double[] { 0 }, "A")
};
var emissions = new DiscreteDistribution[2];
emissions[0] = new DiscreteDistribution(new double[] { 0, 1 }, new[] { 0.4, 0.6 });
emissions[1] = new DiscreteDistribution(new double[] { 0, 1 }, new[] { 0.5, 0.5 });
var symbols = new List <IObservation> {
new Observation(new double[] { 0 }, "A"), new Observation(new double[] { 1 }, "B")
};
var model = HiddenMarkovModelFactory.GetModel(new ModelCreationParameters <DiscreteDistribution>()
{
Pi = startDistribution, TransitionProbabilityMatrix = tpm, Emissions = emissions
}); //new HiddenMarkovModel(startDistribution, tpm, emissions) { LogNormalized = true};
model.Normalized = true;
var algo = new BaumWelch(observations, model, symbols);
var res = algo.Run(100, LikelihoodTolerance);
Assert.AreEqual(0.82585, Math.Round(res.Pi[0], 5));
Assert.AreEqual(0.17415, Math.Round(res.Pi[1], 5));
Assert.AreEqual(0.33005, Math.Round(res.TransitionProbabilityMatrix[0][0], 5));
Assert.AreEqual(0.66995, Math.Round(res.TransitionProbabilityMatrix[0][1], 5));
Assert.AreEqual(0.09871, Math.Round(res.TransitionProbabilityMatrix[1][0], 5));
Assert.AreEqual(0.90129, Math.Round(res.TransitionProbabilityMatrix[1][1], 5));
Assert.AreEqual(0.65845, Math.Round(res.Emission[0].ProbabilityMassFunction(0), 5));
Assert.AreEqual(0.34155, Math.Round(res.Emission[0].ProbabilityMassFunction(1), 5));
Assert.AreEqual(0.41225, Math.Round(res.Emission[1].ProbabilityMassFunction(0), 5));
Assert.AreEqual(0.58775, Math.Round(res.Emission[1].ProbabilityMassFunction(1), 5));
Assert.AreEqual(-2.5638779209981162, res.Likelihood);
Assert.AreEqual(1d, Math.Round(res.Pi.Sum(), 5));
Assert.AreEqual(1d, Math.Round(res.TransitionProbabilityMatrix[0].Sum(), 5));
Assert.AreEqual(1d, Math.Round(res.TransitionProbabilityMatrix[1].Sum(), 5));
Assert.AreEqual(1d, Math.Round(res.Emission[0].ProbabilityMassFunction(0) + res.Emission[0].ProbabilityMassFunction(1), 5));
Assert.AreEqual(1d, Math.Round(res.Emission[1].ProbabilityMassFunction(0) + res.Emission[1].ProbabilityMassFunction(1), 5));
}
public void BivariateAssociationDiscreteNullDistribution()
{
Random rng = new Random(1);
// Pick very non-normal distributions for our non-parameteric tests
ContinuousDistribution xd = new FrechetDistribution(1.0);
ContinuousDistribution yd = new CauchyDistribution();
// Pick small sample sizes to get exact distributions
foreach (int n in TestUtilities.GenerateIntegerValues(4, 24, 4))
{
// Do a bunch of test runs, recording reported statistic for each.
List <int> spearmanStatistics = new List <int>();
List <int> kendallStatistics = new List <int>();
DiscreteDistribution spearmanDistribution = null;
DiscreteDistribution kendallDistribution = null;
for (int i = 0; i < 512; i++)
{
List <double> x = new List <double>();
List <double> y = new List <double>();
for (int j = 0; j < n; j++)
{
x.Add(xd.GetRandomValue(rng));
y.Add(yd.GetRandomValue(rng));
}
DiscreteTestStatistic spearman = Bivariate.SpearmanRhoTest(x, y).UnderlyingStatistic;
if (spearman != null)
{
spearmanStatistics.Add(spearman.Value);
spearmanDistribution = spearman.Distribution;
}
DiscreteTestStatistic kendall = Bivariate.KendallTauTest(x, y).UnderlyingStatistic;
if (kendall != null)
{
kendallStatistics.Add(kendall.Value);
kendallDistribution = kendall.Distribution;
}
}
// Test whether statistics are actually distributed as claimed
if (spearmanDistribution != null)
{
TestResult spearmanChiSquared = spearmanStatistics.ChiSquaredTest(spearmanDistribution);
Assert.IsTrue(spearmanChiSquared.Probability > 0.01);
}
if (kendallDistribution != null)
{
TestResult kendallChiSquared = kendallStatistics.ChiSquaredTest(kendallDistribution);
Assert.IsTrue(kendallChiSquared.Probability > 0.01);
}
}
}
/// <summary>
/// Select a subset of items from a superset of a given size.
/// </summary>
/// <param name="supersetCount">The size of the superset to select from.</param>
/// <param name="rng">Random source.</param>
/// <returns>An array of indexes that are the selected items.</returns>
public int[] SelectSubset(int supersetCount, IRandomSource rng)
{
// Note. Ideally we'd return a sorted list of indexes to improve performance of the code that consumes them,
// however, the sampling process inherently produces samples in randomized order, thus the decision of whether
// to sort or not depends on the cost to the code using the samples. I.e. don't sort here!
int selectionCount = (int)NumericsUtils.StochasticRound(supersetCount * _selectionProportion, rng);
int[] idxArr = new int[selectionCount];
DiscreteDistribution.SampleUniformWithoutReplacement(rng, supersetCount, idxArr);
return(idxArr);
}
private List <NeatGenome <T> > CreateOffspring(
Species <T>[] speciesArr,
DiscreteDistribution speciesDist,
DiscreteDistribution[] genomeDistArr,
double interspeciesMatingProportion,
IRandomSource rng)
{
// Calc total number of offspring to produce for the population as a whole.
int offspringCount = speciesArr.Sum(x => x.Stats.OffspringCount);
// Create an empty list to add the offspring to (with preallocated storage).
var offspringList = new List <NeatGenome <T> >(offspringCount);
// Loop the species.
for (int speciesIdx = 0; speciesIdx < speciesArr.Length; speciesIdx++)
{
// Get the current species.
Species <T> species = speciesArr[speciesIdx];
// Get the DiscreteDistribution for genome selection within the current species.
DiscreteDistribution genomeDist = genomeDistArr[speciesIdx];
// Determine how many offspring to create through asexual and sexual reproduction.
SpeciesStats stats = species.Stats;
int offspringCountAsexual = stats.OffspringAsexualCount;
int offspringCountSexual = stats.OffspringSexualCount;
// Special case: A species with a single genome marked for selection, cannot perform intra-species sexual reproduction.
if (species.Stats.SelectionSizeInt == 1)
{
// Note. here we assign all the sexual reproduction allocation to asexual reproduction. In principle
// we could still perform inter species sexual reproduction, but that complicates the code further
// for minimal gain.
offspringCountAsexual += offspringCountSexual;
offspringCountSexual = 0;
}
// Create a copy of speciesDist with the current species removed from the set of possibilities.
// Note. The remaining probabilities are normalised to sum to one.
DiscreteDistribution speciesDistUpdated = speciesDist.RemoveOutcome(speciesIdx);
// Create offspring from the current species.
CreateSpeciesOffspringAsexual(
species, genomeDist, offspringCountAsexual, offspringList, rng);
CreateSpeciesOffspringSexual(
speciesArr, species, speciesDistUpdated,
genomeDistArr, genomeDist,
offspringCountSexual, offspringList,
interspeciesMatingProportion, rng);
}
return(offspringList);
}
public static JArray ToJObject(this DiscreteDistribution d)
{
return(new JArray(
d
.Masses
.Select(p => new JObject(
new JProperty("value", p.Key),
new JProperty("mass", p.Value))
)
));
}
private NeatGenome <T> Create(
NeatGenome <T> parent,
IRandomSource rng,
ref DiscreteDistribution mutationTypeDist)
{
// Determine the type of mutation to attempt.
MutationType mutationTypeId = (MutationType)DiscreteDistribution.Sample(rng, mutationTypeDist);
// Attempt to create a child genome using the selected mutation type.
NeatGenome <T> childGenome = null;
switch (mutationTypeId)
{
// Note. These subroutines will return null if they cannot produce a child genome,
// e.g. 'delete connection' will not succeed if there is only one connection.
case MutationType.ConnectionWeight:
childGenome = _mutateWeightsStrategy.CreateChildGenome(parent, rng);
break;
case MutationType.AddNode:
// FIXME: Reinstate.
childGenome = _addNodeStrategy.CreateChildGenome(parent, rng);
break;
case MutationType.AddConnection:
childGenome = _addConnectionStrategy.CreateChildGenome(parent, rng);
break;
case MutationType.DeleteConnection:
childGenome = _deleteConnectionStrategy.CreateChildGenome(parent, rng);
break;
default:
throw new Exception($"Unexpected mutationTypeId [{mutationTypeId}].");
}
if (null != childGenome)
{
return(childGenome);
}
// The chosen mutation type was not possible; remove that type from the set of possible types.
mutationTypeDist = mutationTypeDist.RemoveOutcome((int)mutationTypeId);
// Sanity test.
if (0 == mutationTypeDist.Probabilities.Length)
{ // This shouldn't be possible, hence this is an exceptional circumstance.
// Note. Connection weight and 'add node' mutations should always be possible, because there should
// always be at least one connection.
throw new Exception("All types of genome mutation failed.");
}
return(null);
}
public void TestGetProbability1()
{
Random random = new Random();
DiscreteDistribution discreteDistribution = new DiscreteDistribution();
for (int i = 0; i < 1000; i++)
{
discreteDistribution.AddItem("" + i);
}
Assert.AreEqual(0.001, discreteDistribution.GetProbability("" + random.Next(1000)), 0.0);
}
/// <summary>
/// Create instances of <see cref="DiscreteDistribution"/> for sampling species, and for genomes within each given species.
/// </summary>
/// <param name="speciesArr">Species array.</param>
/// <param name="speciesDist">Returns a new instance of <see cref="DiscreteDistribution"/> for sampling from the species array.</param>
/// <param name="genomeDistArr">Returns an array of <see cref="DiscreteDistribution"/>, for sampling from genomes within each species.</param>
/// <param name="nonEmptySpeciesCount">Returns the number of species that contain at least one genome.</param>
public static void CreateSelectionDistributions(
Species <T>[] speciesArr,
out DiscreteDistribution speciesDist,
out DiscreteDistribution?[] genomeDistArr,
out int nonEmptySpeciesCount)
{
// Species selection distribution.
speciesDist = CreateSpeciesSelectionDistribution(speciesArr, out nonEmptySpeciesCount);
// Per-species genome selection distributions.
genomeDistArr = CreateIntraSpeciesGenomeSelectionDistributions(speciesArr);
}
public void TestGetSum2()
{
Random random = new Random();
DiscreteDistribution discreteDistribution = new DiscreteDistribution();
for (int i = 0; i < 1000; i++)
{
discreteDistribution.AddItem("" + random.Next(1000));
}
Assert.AreEqual(1000, discreteDistribution.GetSum(), 0.0);
}
/**
* <summary> Training algorithm for Naive Bayes algorithm with a discrete data set.</summary>
* <param name="priorDistribution">Probability distribution of classes P(C_i)</param>
* <param name="classLists">Instances are divided into K lists, where each list contains only instances from a single class</param>
*/
private void TrainDiscreteVersion(DiscreteDistribution priorDistribution, Partition classLists)
{
var classAttributeDistributions =
new Dictionary <string, List <DiscreteDistribution> >();
for (var i = 0; i < classLists.Size(); i++)
{
classAttributeDistributions[((InstanceListOfSameClass)classLists.Get(i)).GetClassLabel()] =
classLists.Get(i).AllAttributesDistribution();
}
model = new NaiveBayesModel(priorDistribution, classAttributeDistributions);
}
public static float[] randoms(float[] probs, int count)
{
int W = probs.Length;
var dist = new DiscreteDistribution(probs);
float[] values = new float[count];
for (int i = 0; i < count; i++)
{
int x = _engine.Random(dist);
values [i] = x / (float)W;
}
return(values);
}
public void TestRemoveDistribution()
{
DiscreteDistribution discreteDistribution = new DiscreteDistribution();
discreteDistribution.AddItem("item1");
discreteDistribution.AddItem("item1");
discreteDistribution.AddItem("item2");
smallDistribution.RemoveDistribution(discreteDistribution);
Assert.AreEqual(1, smallDistribution.GetCount("item1"));
Assert.AreEqual(1, smallDistribution.GetCount("item2"));
Assert.AreEqual(1, smallDistribution.GetCount("item3"));
smallDistribution.AddDistribution(discreteDistribution);
}
/**
* <summary> The discreteIndexedAttributeClassDistribution method takes an attribute index and an attribute value as inputs.
* It loops through the instances, gets the corresponding value of given attribute index and given attribute value.
* Then, adds the class label of that instance to the discrete indexed distributions list.</summary>
*
* <param name="attributeIndex">Index of the attribute.</param>
* <param name="attributeValue">Value of the attribute.</param>
* <returns>Distribution of the class labels.</returns>
*/
public DiscreteDistribution DiscreteIndexedAttributeClassDistribution(int attributeIndex, int attributeValue)
{
var distribution = new DiscreteDistribution();
foreach (var instance in _list)
{
if (((DiscreteIndexedAttribute)instance.GetAttribute(attributeIndex)).GetIndex() == attributeValue)
{
distribution.AddItem(instance.GetClassLabel());
}
}
return(distribution);
}
public void WilcoxonNullDistribution()
{
// Pick a very non-normal distribution
ContinuousDistribution d = new ExponentialDistribution();
Random rng = new Random(271828);
foreach (int n in TestUtilities.GenerateIntegerValues(4, 64, 4))
{
Sample wContinuousSample = new Sample();
ContinuousDistribution wContinuousDistribution = null;
List <int> wDiscreteSample = new List <int>();
DiscreteDistribution wDiscreteDistribution = null;
for (int i = 0; i < 256; i++)
{
BivariateSample sample = new BivariateSample();
for (int j = 0; j < n; j++)
{
double x = d.GetRandomValue(rng);
double y = d.GetRandomValue(rng);
sample.Add(x, y);
}
TestResult wilcoxon = sample.WilcoxonSignedRankTest();
if (wilcoxon.UnderlyingStatistic != null)
{
wDiscreteSample.Add(wilcoxon.UnderlyingStatistic.Value);
wDiscreteDistribution = wilcoxon.UnderlyingStatistic.Distribution;
}
else
{
wContinuousSample.Add(wilcoxon.Statistic.Value);
wContinuousDistribution = wilcoxon.Statistic.Distribution;
}
}
if (wDiscreteDistribution != null)
{
TestResult chi2 = wDiscreteSample.ChiSquaredTest(wDiscreteDistribution);
Assert.IsTrue(chi2.Probability > 0.01);
}
else
{
TestResult ks = wContinuousSample.KolmogorovSmirnovTest(wContinuousDistribution);
Assert.IsTrue(ks.Probability > 0.01);
Assert.IsTrue(wContinuousSample.PopulationMean.ConfidenceInterval(0.99).ClosedContains(wContinuousDistribution.Mean));
Assert.IsTrue(wContinuousSample.PopulationStandardDeviation.ConfidenceInterval(0.99).ClosedContains(wContinuousDistribution.StandardDeviation));
}
}
}
/**
* <summary> The attributeDistribution method takes an index as an input and if the attribute of the instance at given index is
* discrete, it returns the distribution of the attributes of that instance.</summary>
*
* <param name="index">Index of the attribute.</param>
* <returns>Distribution of the attribute.</returns>
*/
public DiscreteDistribution AttributeDistribution(int index)
{
var distribution = new DiscreteDistribution();
if (_list[0].GetAttribute(index) is DiscreteAttribute)
{
foreach (var instance in _list)
{
distribution.AddItem(((DiscreteAttribute)instance.GetAttribute(index)).GetValue());
}
}
return(distribution);
}
public void TestGetProbabilityLaplaceSmoothing1()
{
Random random = new Random();
DiscreteDistribution discreteDistribution = new DiscreteDistribution();
for (int i = 0; i < 1000; i++)
{
discreteDistribution.AddItem("" + i);
}
Assert.AreEqual(2.0 / 2001, discreteDistribution.GetProbabilityLaplaceSmoothing("" + random.Next(1000)),
0.0);
Assert.AreEqual(1.0 / 2001, discreteDistribution.GetProbabilityLaplaceSmoothing("item0"), 0.0);
}
/// <summary>
/// Performs a χ<sup>2</sup> test comparing the histogram to the given distribution.
/// </summary>
/// <param name="distribution">The distribution against which to test the histogram.</param>
/// <returns>The test result.</returns>
public TestResult ChiSquaredTest(DiscreteDistribution distribution)
{
if (distribution == null)
{
throw new ArgumentNullException(nameof(distribution));
}
double chi2 = 0.0;
int dof = 0;
//int lastObservedCounts = extraCounts;
//double lastExpectedCounts = (distribution.LeftExclusiveProbability(0) + distribution.RightExclusiveProbability(counts.Length - 1)) * total;
int lastObservedCounts = 0;
double lastExpectedCounts = 0.0;
int observedCounts = 0;
double expectedCounts = 0.0;
for (int i = 0; i < storage.Count; i++)
{
observedCounts += storage.GetCounts(i + 1);
expectedCounts += distribution.ProbabilityMass(i) * storage.Total;
if (expectedCounts > 4.0)
{
if (lastExpectedCounts > 0.0)
{
chi2 += MoreMath.Sqr(lastObservedCounts - lastExpectedCounts) / lastExpectedCounts;
dof++;
}
lastObservedCounts = observedCounts;
lastExpectedCounts = expectedCounts;
observedCounts = 0;
expectedCounts = 0.0;
}
}
lastObservedCounts += observedCounts;
lastExpectedCounts += expectedCounts;
if (lastExpectedCounts > 0.0)
{
chi2 += MoreMath.Sqr(lastObservedCounts - lastExpectedCounts) / lastExpectedCounts;
}
ContinuousDistribution nullDistribution = new ChiSquaredDistribution(dof);
return(new TestResult("χ²", chi2, nullDistribution, TestType.RightTailed));
}
private void Awake()
{
if ((GameInfos.level + 1) % m_bossLevel == 0)
{
spawnBoss();
return;
}
var rand = new StaticRandomGenerator <DefaultRandomGenerator>();
int nb = m_enemyCountBase + new UniformIntDistribution((int)(m_minEnemyCountPerLevel * GameInfos.level), (int)(m_maxEnemyCountPerLevel * GameInfos.level) + 1).Next(rand);
for (int i = 0; i < nb; i++)
{
Vector2 pos = Vector2.zero;
for (int j = 0; j < 10; j++)
{
pos = new UniformVector2SquareDistribution(-m_spawnRadius, m_spawnRadius, -m_spawnRadius, m_spawnRadius).Next(rand);
if (pos.sqrMagnitude < m_dontSpawnRadius * m_dontSpawnRadius)
{
continue;
}
break;
}
List <float> weights = new List <float>();
foreach (var en in m_enemy)
{
weights.Add(en.baseWeight + en.levelWeight * GameInfos.level);
}
var index = new DiscreteDistribution(weights).Next(rand);
var e = m_enemy[index];
var mob = Instantiate(e.enemyPrefab);
mob.transform.position = new Vector3(pos.x, pos.y, -1);
Modifier m = new Modifier();
m.life = (int)(e.levelLife * GameInfos.level);
m.speed = (int)(e.levelSpeed * GameInfos.level);
m.fireRate = (int)(e.levelFireRate * GameInfos.level);
m.power = (int)(e.levelPower * GameInfos.level);
var s = mob.GetComponent <ShipLogic>();
s.modifiers.Add(m);
s.updateModifierStats();
}
spawnExit();
}
internal WeightMutationDistribution(WeightMutations weightMutations, IRandomSource rng)
{
_rng = rng;
_weightMutations = weightMutations.Mutations;
var probArr = new double[_weightMutations.Count];
var labelArr = new int[_weightMutations.Count];
for (var i = 0; i < _weightMutations.Count; i++)
{
probArr[i] = _weightMutations[i].RouletteWheelShare;
labelArr[i] = i;
}
_distribution = new DiscreteDistribution(probArr, labelArr);
}
/// <summary>
/// Create a new child genome from a given parent genome.
/// </summary>
/// <param name="parent">The parent genome.</param>
/// <param name="rng">Random source.</param>
/// <returns>A new child genome.</returns>
public NeatGenome <T> CreateChildGenome(NeatGenome <T> parent, IRandomSource rng)
{
// Get a discrete distribution over the set of possible mutation types.
DiscreteDistribution mutationTypeDist = GetMutationTypeDistribution(parent);
// Keep trying until a child genome is created.
for (;;)
{
NeatGenome <T>?childGenome = Create(parent, rng, ref mutationTypeDist);
if (childGenome is not null)
{
return(childGenome);
}
}
}
public static DiscreteDistribution ToDiscreteDistribution(this JToken json0)
{
JArray json = (JArray)json0;
List<Tuple<float, double>> masses = new List<Tuple<float, double>>();
foreach (JObject j in json)
{
masses.Add(new Tuple<float, double>(
j.Property("value").Value.Value<float>(),
j.Property("mass").Value.Value<double>()));
}
DiscreteDistribution distribution = new DiscreteDistribution(masses);
return distribution;
}
private static DiscreteDistribution[] CreateIntraSpeciesGenomeSelectionDistributions(
Species <T>[] speciesArr)
{
int speciesCount = speciesArr.Length;
DiscreteDistribution[] distArr = new DiscreteDistribution[speciesCount];
// For each species build a DiscreteDistribution for genome selection within
// that species. I.e. fitter genomes have higher probability of selection.
for (int i = 0; i < speciesCount; i++)
{
distArr[i] = CreateIntraSpeciesGenomeSelectionDistribution(speciesArr[i]);
}
return(distArr);
}
/**
* <summary> Training algorithm for Naive Bayes algorithm with a continuous data set.</summary>
*
* <param name="priorDistribution">Probability distribution of classes P(C_i)</param>
* <param name="classLists"> Instances are divided into K lists, where each list contains only instances from a single class</param>
*/
private void TrainContinuousVersion(DiscreteDistribution priorDistribution, Partition classLists)
{
var classMeans = new Dictionary <string, Vector>();
var classDeviations = new Dictionary <string, Vector>();
for (var i = 0; i < classLists.Size(); i++)
{
var classLabel = ((InstanceListOfSameClass)classLists.Get(i)).GetClassLabel();
var averageVector = classLists.Get(i).Average().ToVector();
classMeans[classLabel] = averageVector;
var standardDeviationVector = classLists.Get(i).StandardDeviation().ToVector();
classDeviations[classLabel] = standardDeviationVector;
}
model = new NaiveBayesModel(priorDistribution, classMeans, classDeviations);
}
protected double MeasureDissimilarityES(DiscreteDistribution d1, DiscreteDistribution d2)
{
// Error sum.
var errorSum = d1.ErrorSum(d2);
return errorSum;
}
/// <summary>
/// Initializes a new instance of the <see cref="iohmma.MarkovProcessBase"/> class with the given number of hidden states.
/// </summary>
/// <param name="nhidden">The number of hidden states for the initialized hidden Markov saw.</param>
public MarkovProcessBase(int nhidden)
{
this.Pi = new DiscreteDistribution (nhidden);
}
/// <summary>
/// Initializes a new shim that represents a discrete distribution as a continuous distribution.
/// </summary>
/// <param name="distribution">The discrete distiribution to represent.</param>
public DiscreteAsContinuousDistribution(DiscreteDistribution distribution)
{
if (distribution == null) throw new ArgumentNullException("distribution");
this.d = distribution;
this.xSupport = Interval.FromEndpoints(d.Minimum, d.Maximum);
}
/// <summary>
/// Initializes a new shim that represents a discrete distribution as a continuous distribution.
/// </summary>
/// <param name="distribution">The discrete distiribution to represent.</param>
/// <param name="support">The continuous support interval into which the discrete support interval is to be mapped.</param>
public DiscreteAsContinuousDistribution(DiscreteDistribution distribution, Interval support)
{
if (distribution == null) throw new ArgumentNullException("distribution");
this.d = distribution;
this.xSupport = support;
}
protected double MeasureDissimilarityKL(DiscreteDistribution d1, DiscreteDistribution d2)
{
// Symmetric KL divergence.
var kl1 = d1.KLDivergence(d2);
var kl2 = d2.KLDivergence(d1);
return kl1 + kl2;
}
public void TestCumulant2()
{
int n = 8;
//Distribution[] set = new Distribution[] { new UniformDistribution(), new ExponentialDistribution(2.0), new GammaDistribution(3.0), new LogisticDistribution(-4.0, 3.0), new NormalDistribution(-1.0, 2.0), new WaldDistribution(1.0, 2.0) };
DiscreteDistribution[] set = new DiscreteDistribution[] { new PoissonDistribution(0.25), new DiscreteUniformDistribution(0, 10) };
foreach (DiscreteDistribution d in set) {
//foreach (Distribution d in set) {
Console.WriteLine(d.GetType().Name);
// From cumulants to central and raw moments
double[] inK = new double[n];
for (int r = 0; r < n; r++) inK[r] = d.Cumulant(r);
double[] outC = MomentMath.CumulantToCentral(inK);
for (int r = 0; r < n; r++) Console.WriteLine("r={0} K={1} -> C={2} v C={3}", r, inK[r], d.MomentAboutMean(r), outC[r]);
for (int r = 0; r < n; r++) Assert.IsTrue(Math.Abs(outC[r] - d.MomentAboutMean(r)) <= 1.0E-14 * Math.Abs(outC[r]));
double[] outM = MomentMath.CumulantToRaw(inK);
for (int r = 0; r < n; r++) Assert.IsTrue(Math.Abs(outM[r] - d.Moment(r)) <= 1.0E-14 * Math.Abs(outM[r]));
// From central moments to cumulants and raw moments
double[] inC = new double[n];
for (int r = 0; r < n; r++) inC[r] = d.MomentAboutMean(r);
double[] outK = MomentMath.CentralToCumulant(d.Mean, inC);
for (int r = 0; r < n; r++) Console.WriteLine("r={0} C={1:R} -> K={2:R} v K={3:R}", r, inC[r], outK[r], d.Cumulant(r));
for (int r = 0; r < n; r++) Assert.IsTrue(Math.Abs(outK[r] - d.Cumulant(r)) <= 1.0E-13 * Math.Abs(outK[r]));
// moved to 10E-13 due to K_4 of Logistic; why is there even that much disagreement?
double[] outM2 = MomentMath.CentralToRaw(d.Mean, inC);
for (int r = 0; r < n; r++) Assert.IsTrue(Math.Abs(outM2[r] - d.Moment(r)) <= 1.0E-14 * Math.Abs(outM2[r]));
// From raw moments to central moments and cumulants
// This is unstable.
}
}
