public void WeightedMeanShiftConstructorTest2()
{
Accord.Math.Tools.SetupGenerator(1);
// Declare some observations
double[][] observations1 =
{
new double[] { -5, -2, -4 },
new double[] { -5, -5, -6 },
new double[] { 1, 1, 2 },
new double[] { 1, 1, 2 },
new double[] { 1, 1, 2 },
new double[] { 1, 1, 2 },
new double[] { 11, 5, 4 },
new double[] { 15, 5, 6 },
new double[] { 10, 5, 6 },
};
int[] weights1 = { 1, 1, 1, 1, 1, 1, 1, 1, 1 };
// Declare some observations
double[][] observations2 =
{
new double[] { -5, -2, -4 },
new double[] { -5, -5, -6 },
new double[] { 1, 1, 2 },
// new double[] { 1, 1, 2 },
// new double[] { 1, 1, 2 },
// new double[] { 1, 1, 2 },
new double[] { 11, 5, 4 },
new double[] { 15, 5, 6 },
new double[] { 10, 5, 6 },
};
int[] weights2 = { 1, 1, 4, 1, 1, 1 };
Accord.Math.Random.Generator.Seed = 1;
var ms1 = new MeanShift(dimension: 3, kernel: new UniformKernel(), bandwidth: 2);
ms1.UseParallelProcessing = false;
ms1.Compute(observations1);
Accord.Math.Random.Generator.Seed = 1;
var ms2 = new MeanShift(dimension: 3, kernel: new UniformKernel(), bandwidth: 2);
ms2.UseParallelProcessing = false;
ms2.Compute(observations1, weights1);
Accord.Math.Random.Generator.Seed = 1;
var ms3 = new MeanShift(dimension: 3, kernel: new UniformKernel(), bandwidth: 2);
ms3.UseParallelProcessing = false;
ms3.Compute(observations2, weights2);
int[] labels1 = ms1.Clusters.Nearest(observations1);
int[] labels2 = ms2.Clusters.Nearest(observations1);
int[] labels3 = ms3.Clusters.Nearest(observations1);
Assert.IsTrue(Matrix.IsEqual(labels1, labels2));
Assert.IsTrue(Matrix.IsEqual(labels1, labels3));
Assert.IsTrue(Matrix.IsEqual(ms1.Clusters.Modes, ms2.Clusters.Modes, 1e-3));
Assert.IsTrue(Matrix.IsEqual(ms1.Clusters.Modes, ms3.Clusters.Modes, 1e-3));
Assert.IsTrue(Matrix.IsEqual(ms1.Clusters.Proportions, ms2.Clusters.Proportions));
Assert.IsTrue(Matrix.IsEqual(ms1.Clusters.Proportions, ms3.Clusters.Proportions));
Assert.AreEqual(3 / 9.0, ms3.Clusters.Proportions[labels1[6]], 1e-6);
Assert.AreEqual(2 / 9.0, ms3.Clusters.Proportions[labels1[0]], 1e-6);
Assert.AreEqual(4 / 9.0, ms3.Clusters.Proportions[labels1[2]], 1e-6);
}
