public void AddFeatureOverflowTest()
{
Feature testFeature = new DoubleFeature(new AbsoluteDistance(), 4.0);
Feature testFeature2 = new DoubleFeature(new AbsoluteDistance(), 3.0);
Observation testObservation = new Observation(1);
testObservation.AddFeature(testFeature);
testObservation.AddFeature(testFeature2);
}
public void AddChildFeatureTest()
{
ComplexFeature test = new ComplexFeature(first);
Feature testingchild = new DoubleFeature(first, 2.0);
test.AddChildFeature(testingchild);
Assert.AreEqual(test.ChildFeaturesCount, 1);
}
public void CalculateDistanceTest()
{
//arrange
DistanceMetric firstMetric = new AbsoluteDistance();
Feature initial = new DoubleFeature(firstMetric, 20.0);
Feature initial2 = new DoubleFeature(firstMetric, 22.0);
//act, assert
Assert.AreEqual(initial.CalculateDistance(initial2), 2);
}
public void AddFeatureTest()
{
Feature testingFeature = new DoubleFeature(new AbsoluteDistance(), 2.0);
Observation testingObs = new Observation(1);
testingObs.AddFeature(testingFeature);
Assert.AreEqual(testingObs.FeaturesCount, 1);
}
public void GetChildFeatureTest()
{
ComplexFeature test = new ComplexFeature(first);
Feature testingchild = new DoubleFeature(first, 2.0);
test.AddChildFeature(testingchild);
Feature child = test.GetChildFeature(0);
//assert
Assert.AreSame(child, testingchild);
}
public void ReplaceFeatureTest()
{
Feature testingFeature = new DoubleFeature(new AbsoluteDistance(), 2.0);
Feature replacement = new DoubleFeature(new AbsoluteDistance(), 6.0);
Observation testingObs = new Observation(1);
testingObs.AddFeature(testingFeature);
testingObs.ReplaceFeature(0, replacement);
Assert.AreSame(replacement, testingObs.GetFeature(0));
Assert.AreEqual(6.0, testingObs.GetFeature(0).FeatureValue);
}
public void GetFeatureTest()
{
Feature testingFeature = new DoubleFeature(new AbsoluteDistance(), 2.0);
Observation testingObs = new Observation(1);
testingObs.AddFeature(testingFeature);
Feature returned = testingObs.GetFeature(0);
Assert.AreSame(returned, testingFeature);
}
public void AddMemberTest()
{
Cluster testCluster = new Cluster();
Feature testFeature = new DoubleFeature(new AbsoluteDistance(), 4.0);
Observation testObservation = new Observation(3);
testObservation.AddFeature(testFeature);
//act
testCluster.AddMember(testObservation);
//assert
Assert.AreEqual(testCluster.ClusterCount, 1);
}
public void SumTest()
{
//arrange
DistanceMetric firstMetric = new AbsoluteDistance();
Feature initial = new DoubleFeature(firstMetric, 20.0);
Feature initial2 = new DoubleFeature(firstMetric, 22.0);
//act
Feature result = initial2.Sum(initial);
//assert
Assert.AreEqual(result.FeatureValue, 42.0);
Assert.AreSame(result.MetricUsed, firstMetric);
}
public void ReCalculateCentroidTest()
{
// not really testable code ####consider redefining ReCalculate centroid
Cluster testCluster = new Cluster();
Feature testFeature = new DoubleFeature(new AbsoluteDistance(), 4.0);
Feature testFeature1 = new DoubleFeature(new AbsoluteDistance(), 5.0);
Feature testFeature2 = new DoubleFeature(new AbsoluteDistance(), 15.0);
Feature testFeature3 = new DoubleFeature(new AbsoluteDistance(), 25.0);
Feature testFeature4 = new DoubleFeature(new AbsoluteDistance(), 7.0);
Feature testFeature5 = new DoubleFeature(new AbsoluteDistance(), 8.0);
Feature testFeature6 = new DoubleFeature(new AbsoluteDistance(), 8.0);
Feature testFeature7 = new DoubleFeature(new AbsoluteDistance(), 10.0);
Observation testObservation = new Observation(2);
Observation testObservation1 = new Observation(2);
Observation testObservation2 = new Observation(2);
Observation initialCentroid = new Observation(2);
initialCentroid.AddFeature(testFeature);
initialCentroid.AddFeature(testFeature1);
testCluster.ClusterCentroid = initialCentroid;
testObservation.AddFeature(testFeature2);
testObservation.AddFeature(testFeature3);
testCluster.AddMember(testObservation);
testObservation1.AddFeature(testFeature4);
testObservation1.AddFeature(testFeature5);
testCluster.AddMember(testObservation1);
testObservation2.AddFeature(testFeature6);
testObservation2.AddFeature(testFeature7);
testCluster.AddMember(testObservation2);
//act
testCluster.ReCalculateCentroid();
//assert
Assert.AreEqual(10.0, testCluster.ClusterCentroid.GetFeature(0).FeatureValue);
Assert.AreSame(initialCentroid, testCluster.OldClusterCentroid);
}
private static void CreateDoubleFeature(IEnumerable <string> values, string[] headers, int index, InstanceModel model, List <string[]> matrix,
Instance[] result)
{
double[] casted =
values.Where(v => !string.IsNullOrWhiteSpace(v)).Select(double.Parse).ToArray();
var newModel = new DoubleFeature(TextToId(headers[index]), index)
{
MinValue = casted.Min(),
MaxValue = casted.Max(),
};
model.Features[index] = newModel;
for (int i = 0; i < matrix.Count; i++)
{
string asStr = matrix[i][index];
result[i][newModel] = string.IsNullOrWhiteSpace(asStr) ? double.NaN : double.Parse(asStr);
}
}
