Accord.Tests.MachineLearning.SPTreeTest.FromDataTest2 C# (CSharp) Method

        public void FromDataTest2()
        {
            Accord.Math.Random.Generator.Seed = 0;

            double[][] points =
            {
                new double[] { 2, 3 },
                new double[] { 5, 4 },
                new double[] { 9, 6 },
                new double[] { 4, 7 },
                new double[] { 8, 1 },
                new double[] { 7, 2 },
            };


            var tree = SPTree.FromData(points);

            var nodes = tree.ToList();

            Assert.IsTrue(tree.Root.IsCorrect());


            foreach (var p in points)
            {
                Assert.IsTrue(nodes.Where(x => x.IsLeaf && !x.IsEmpty)
                    .Select(x => x.Position)
                    .Contains(p, new ArrayComparer<double>()));
            }


            Assert.IsTrue(tree.Root.IsCorrect());
            Assert.IsFalse(tree.Root.IsLeaf);

            Assert.IsNull(tree.Root.Position);
            Assert.AreEqual(5.8333333333333339, tree.Root.CenterOfMass[0]);
            Assert.AreEqual(3.8333333333333339, tree.Root.CenterOfMass[1]);

            Assert.AreEqual(4, tree.Root.Children.Length);
            Assert.AreEqual(9, tree.Root.Children[0].Position[0]);
            Assert.AreEqual(6, tree.Root.Children[0].Position[1]);

            Assert.IsNull(tree.Root.Children[1].Position);
            Assert.AreEqual(4.5, tree.Root.Children[1].CenterOfMass[0]);
            Assert.AreEqual(5.5, tree.Root.Children[1].CenterOfMass[1]);
        }