/// <summary>
/// Splits the observations and targets into a training and a test set.
/// </summary>
/// <param name="splitter">The type of splitter used for dertermining the distribution of observations</param>
/// <param name="observations">The observations for the problem</param>
/// <param name="targets">The targets for the problem</param>
/// <returns></returns>
public static TrainingTestSetSplit SplitSet(this ITrainingTestIndexSplitter <double> splitter,
F64Matrix observations, double[] targets)
{
if (observations.RowCount != targets.Length)
{
throw new ArgumentException("Observations and targets has different number of rows");
}
var indexSplit = splitter.Split(targets);
var trainingSet = new ObservationTargetSet((F64Matrix)observations.Rows(indexSplit.TrainingIndices),
targets.GetIndices(indexSplit.TrainingIndices));
var testSet = new ObservationTargetSet((F64Matrix)observations.Rows(indexSplit.TestIndices),
targets.GetIndices(indexSplit.TestIndices));
return(new TrainingTestSetSplit(trainingSet, testSet));
}
public void ObservationTargetSet_Equals()
{
var observations1 = new F64Matrix(new double[] { 1, 2, 3, 4 }, 2, 2);
var observations2 = new F64Matrix(new double[] { 4, 3, 2, 1 }, 2, 2);
var targets1 = new double[] { 1, 2 };
var targets2 = new double[] { 2, 1 };
var sut = new ObservationTargetSet(observations1, targets1);
var equal = new ObservationTargetSet(observations1, targets1);
var notEqual1 = new ObservationTargetSet(observations2, targets1);
var notEqual2 = new ObservationTargetSet(observations1, targets2);
var notEqual3 = new ObservationTargetSet(observations1, targets2);
Assert.AreEqual(sut, equal);
Assert.AreNotEqual(sut, notEqual1);
Assert.AreNotEqual(sut, notEqual2);
Assert.AreNotEqual(sut, notEqual3);
}
/// <summary>
/// Container for storing training set/test set split.
/// </summary>
/// <param name="trainingSet"></param>
/// <param name="testSet"></param>
public TrainingTestSetSplit(ObservationTargetSet trainingSet, ObservationTargetSet testSet)
{
TrainingSet = trainingSet ?? throw new ArgumentNullException("trainingSet");
TestSet = testSet ?? throw new ArgumentNullException("testSet");
}
