public void TestDistanceIncrease2()
{
var dimension = 5;
var entropySketch = new EntropySketchFunction(dimension);
var befVector = ArrayUtils.Init(-1.0, -2.0, -3.0, -4.0, -5.0).ToVector();
var afVector = ArrayUtils.Init(-3.0, -3.0, -3.0, -4.0, -5.0).ToVector();
var befEntropySketchValue = entropySketch.ComputeEntropySketch(befVector);
var afEntropySketchValue = entropySketch.ComputeEntropySketch(afVector);
var closestVector =
IncreaseEntropySketch.l1IncreaseEntropySketchTo(befVector, dimension, afEntropySketchValue,
Approximations.ApproximationEpsilon);
var resultMSE = closestVector.DistL2FromVector()(afVector);
Assert.AreEqual(resultMSE, 0.0, 0.00001);
}
public void TestDistanceDecrease2()
{
var dimension = 5;
var entropySketch = new EntropySketchFunction(dimension);
var befVector = ArrayUtils.Init(-1.0, -2.0, -3.0, -4.0, -5.0).ToVector();
var afVector = ArrayUtils.Init(-0.5, -2.0, -3.0, -4.0, -5.0).ToVector();
var befEntropySketchValue = entropySketch.ComputeEntropySketch(befVector);
var afEntropySketchValue = entropySketch.ComputeEntropySketch(afVector);
var distL1 = (afVector - befVector).L1Norm();
var distance =
DecreaseEntropySketch.l1DecreaseEntropySketchTo(befVector, dimension, afEntropySketchValue,
Approximations.ApproximationEpsilon);
var resultMSE = Math.Pow(distance - distL1, 2);
Assert.AreEqual(resultMSE, 0.0, 0.00001);
}
public static void RunRandomly(Random rnd, int numOfNodes, ApproximationType approximation, int vectorLength, int collapeDimension, int iterations, bool oneChanges,
string resultDir)
{
var entropyResultPath =
PathBuilder.Create(resultDir, "Entropy")
.AddProperty("Dataset", "Random")
.AddProperty("Nodes", numOfNodes.ToString())
.AddProperty("VectorLength", vectorLength.ToString())
.AddProperty("OneChanges", oneChanges.ToString())
.AddProperty("Iterations", iterations.ToString())
.AddProperty("Approximation", approximation.AsString())
.ToPath("csv");
var sketchEntropyResultPath =
PathBuilder.Create(resultDir, "SketchEntropy")
.AddProperty("Dataset", "Random")
.AddProperty("Nodes", numOfNodes.ToString())
.AddProperty("VectorLength", collapeDimension.ToString())
.AddProperty("OneChanges", oneChanges.ToString())
.AddProperty("Iterations", iterations.ToString())
.AddProperty("Approximation", approximation.AsString())
.ToPath("csv");
using (var entropyResultCsvFile = AutoFlushedTextFile.Create(entropyResultPath, AccumaltedResult.Header(numOfNodes)))
using (var sketchEntropyResultCsvFile = AutoFlushedTextFile.Create(sketchEntropyResultPath, AccumaltedResult.Header(numOfNodes)))
{
var sqrt = (int)Math.Sqrt(vectorLength);
var entropyFunction = new EntropyFunction(vectorLength);
var entropySketchFunction = new EntropySketchFunction(collapeDimension);
Func <int, Vector> genVector = node => ArrayUtils.Init(vectorLength, rnd.NextDouble())
.ToVector().NormalizeInPlaceToSum(1.0);
var initVectors = ArrayUtils.Init(numOfNodes, genVector);
var sketchInitVectors = initVectors.Map(entropySketchFunction.CollapseProbabilityVector);
var globalVector = Vector.AverageVector(initVectors);
Vector getChangeVector(int node)
{
if (oneChanges && node >= 1)
{
return(new Vector());
}
var someVector = genVector(node);
Vector changeVector = someVector - globalVector;
if (!oneChanges)
{
changeVector.DivideInPlace(numOfNodes);
}
globalVector.AddInPlace(changeVector / numOfNodes);
return(changeVector);
}
var entropyMultiRunner = MultiRunner.InitAll(initVectors, numOfNodes, vectorLength,
approximation, entropyFunction.MonitoredFunction);
var sketchEntropyMultiRunner = MultiRunner.InitAll(sketchInitVectors, numOfNodes, vectorLength,
approximation, entropySketchFunction.MonitoredFunction);
var shouldStop = new StrongBox <bool>(false);
for (int i = 0; i < iterations; i++)
{
var changes = ArrayUtils.Init(numOfNodes, getChangeVector);
var sketchChanges = changes.Map(entropySketchFunction.CollapseProbabilityVector);
//entropyMultiRunner.Run(changes, rnd, false)
//.SideEffect(r => shouldStop.Value = shouldStop.Value || (r.MonitoringScheme is MonitoringScheme.Oracle && r.NumberOfFullSyncs >= 8))
//.Select(r => r.AsCsvString())
//.ForEach((Action<string>)entropyResultCsvFile.WriteLine);
sketchEntropyMultiRunner.Run(sketchChanges, rnd, false)
.SideEffect(r => shouldStop.Value = shouldStop.Value || (r.MonitoringScheme is MonitoringScheme.Oracle && r.NumberOfFullSyncs >= 8))
.Select(r => r.AsCsvString())
.ForEach((Action <string>)sketchEntropyResultCsvFile.WriteLine);
if (shouldStop.Value)
{
break;
}
}
}
}
