public bool test_Equal_True(out string message)
{
message = "";
DataLeaf a = new DataLeaf(typeof(int));
DataLeaf b = new DataLeaf(typeof(int));
a.Value = 874;
b.Value = 874;
if (!a.Equal(b))
{
message = "wrong result of Equal - value '" + a.Value.ToString() + "' vs '" + b.Value.ToString() + "'";
return(false);
}
a = new DataLeaf(typeof(int[]));
b = new DataLeaf(typeof(int[]));
int [] array = new int[] { 874, 123 };
a.Value = array;
b.Value = array;
if (!a.Equal(b))
{
message = "wrong result of Equal - reference";
return(false);
}
return(true);
}
private static IDecisionNode NodeToDecisionTree(IDataNode node)
{
if (node is DataLeaf)
{
DataLeaf leaf = (DataLeaf)node;
Tactic tactic = EnumUtils.GetEnumValues <Tactic>().MaxBy(t => leaf.ClassDistribution[(int)t]);
return(new DecisionLeaf(tactic));
}
else if (node is AttributeSplit)
{
AttributeSplit attributeSplit = (AttributeSplit)node;
return(new DecisionNode {
Partitioner = new ContinuousPartitioner((ContinuousAxis)attributeSplit.Axis, attributeSplit.SplitValue),
Left = NodeToDecisionTree(attributeSplit.Left),
Right = NodeToDecisionTree(attributeSplit.Right),
});
}
else if (node is CategoricalSplit)
{
CategoricalSplit categoricalSplit = (CategoricalSplit)node;
return(new DecisionNode {
Partitioner = new CategoricalPartitioner(
(CategoricalAxis)categoricalSplit.Axis,
PolicyHelper.BitsToCategories((CategoricalAxis)categoricalSplit.Axis, categoricalSplit.Categories).ToArray()),
Left = NodeToDecisionTree(categoricalSplit.Left),
Right = NodeToDecisionTree(categoricalSplit.Right),
});
}
else
{
throw new ArgumentException("Unknown node type: " + node);
}
}
private static double Accuracy(IDataNode root, IEnumerable <DataPoint> dataPoints)
{
return(dataPoints.Average(dataPoint => {
DataLeaf leaf = Resolve(root, dataPoint);
return (double)leaf.ClassDistribution[dataPoint.Class] / leaf.ClassDistribution.Sum();
}));
}
public bool test_Value_TypeOF(out string message)
{
message = "";
int structValue = 5;
DataLeaf leaf = new DataLeaf(typeof(int));
try
{
leaf.Value = structValue;
if ((int)leaf.Value != structValue)
{
message = "Leaf returns wrong value (struct)";
return(false);
}
}
catch (Exception ex)
{
message = "Cannot put into leaf struct value\n" + ex.Message;
return(false);
}
DataLeafTest value = new DataLeafTest();
leaf = new DataLeaf(typeof(DataLeafTest));
try
{
leaf.Value = value;
if ((DataLeafTest)leaf.Value != value)
{
message = "Leaf returns wrong value (struct)";
return(false);
}
}
catch (Exception ex)
{
message = "Cannot put into leaf struct value\n" + ex.Message;
return(false);
}
return(true);
}
public bool test_Value_null(out string message)
{
message = "";
DataLeaf leaf = new DataLeaf(typeof(DataLeafTest));
try
{
leaf.Value = null;
if (leaf.Value != null)
{
message = "Leaf returns wrong value (struct)";
return(false);
}
}
catch (Exception ex)
{
message = "Cannot put into leaf struct value\n" + ex.Message;
return(false);
}
return(true);
}
public bool test_Equal_False(out string message)
{
message = "";
DataLeaf a = new DataLeaf(typeof(int));
DataLeaf b = new DataLeaf(typeof(int));
a.Value = 874;
b.Value = 144;
if (a.Equal(b))
{
message = "wrong result of Equal - value";
return(false);
}
a = new DataLeaf(typeof(int[]));
b = new DataLeaf(typeof(int[]));
a.Value = new int[] { 123, 874 };
b.Value = new int[] { 874, 123 };
if (a.Equal(b))
{
message = "wrong result of Equal - diffrent references on diffrent values";
return(false);
}
a = new DataLeaf(typeof(int[]));
b = new DataLeaf(typeof(int[]));
a.Value = new int[] { 874, 123 };
b.Value = new int[] { 874, 123 };
if (a.Equal(b))
{
message = "wrong result of Equal - diffrent references on same values";
return(false);
}
return(true);
}
public void TestSimpleAttributeSplit()
{
List <DataPoint> dataPoints = new List <DataPoint> {
new DataPoint {
Class = 0,
Attributes = new float[] { 123 },
Categories = new uint[] { },
Weight = 1.0f,
},
new DataPoint {
Class = 1,
Attributes = new float[] { 456 },
Categories = new uint[] { },
Weight = 1.0f,
},
};
using (CudaManager cudaManager = Provider.CudaManagerPool.GetCudaManagerForThread(Provider.Logger))
using (DecisionLearner decisionLearner = new DecisionLearner(cudaManager, dataPoints)) {
IDataNode root = decisionLearner.FitDecisionTree().Node;
AttributeSplit attributeSplit = (AttributeSplit)root;
Assert.AreEqual(0, attributeSplit.Axis);
Assert.AreEqual(456, attributeSplit.SplitValue);
DataLeaf left = (DataLeaf)attributeSplit.Left;
Assert.AreEqual(1, left.ClassDistribution[0]);
Assert.AreEqual(0, left.ClassDistribution[1]);
DataLeaf right = (DataLeaf)attributeSplit.Right;
Assert.AreEqual(0, right.ClassDistribution[0]);
Assert.AreEqual(1, right.ClassDistribution[1]);
Assert.AreEqual(1.0, Accuracy(root, dataPoints));
}
}
public bool test_Equal_False(out string message)
{
message = "";
DataLeaf a = new DataLeaf(typeof(int));
DataLeaf b = new DataLeaf(typeof(int));
a.Value = 874;
b.Value = 144;
if (a.Equal(b))
{
message = "wrong result of Equal - value";
return false;
}
a = new DataLeaf(typeof(int[]));
b = new DataLeaf(typeof(int[]));
a.Value = new int[]{123, 874};
b.Value = new int[]{874, 123};
if (a.Equal(b))
{
message = "wrong result of Equal - diffrent references on diffrent values";
return false;
}
a = new DataLeaf(typeof(int[]));
b = new DataLeaf(typeof(int[]));
a.Value = new int[]{874, 123};
b.Value = new int[]{874, 123};
if (a.Equal(b))
{
message = "wrong result of Equal - diffrent references on same values";
return false;
}
return true;
}
public bool test_Equal_True(out string message)
{
message = "";
DataLeaf a = new DataLeaf(typeof(int));
DataLeaf b = new DataLeaf(typeof(int));
a.Value = 874;
b.Value = 874;
if (!a.Equal(b))
{
message = "wrong result of Equal - value '" + a.Value.ToString() + "' vs '" + b.Value.ToString()+"'";
return false;
}
a = new DataLeaf(typeof(int[]));
b = new DataLeaf(typeof(int[]));
int [] array = new int[]{874, 123};
a.Value = array;
b.Value = array;
if (!a.Equal(b))
{
message = "wrong result of Equal - reference";
return false;
}
return true;
}
public bool test_Value_null(out string message)
{
message = "";
DataLeaf leaf = new DataLeaf(typeof(DataLeafTest));
try
{
leaf.Value = null;
if (leaf.Value != null)
{
message = "Leaf returns wrong value (struct)";
return false;
}
}
catch (Exception ex)
{
message = "Cannot put into leaf struct value\n" + ex.Message;
return false;
}
return true;
}
public bool test_Value_TypeOF(out string message)
{
message = "";
int structValue = 5;
DataLeaf leaf = new DataLeaf(typeof(int));
try
{
leaf.Value = structValue;
if ((int)leaf.Value != structValue)
{
message = "Leaf returns wrong value (struct)";
return false;
}
}
catch (Exception ex)
{
message = "Cannot put into leaf struct value\n" + ex.Message;
return false;
}
DataLeafTest value = new DataLeafTest();
leaf = new DataLeaf(typeof(DataLeafTest));
try
{
leaf.Value = value;
if ((DataLeafTest)leaf.Value != value)
{
message = "Leaf returns wrong value (struct)";
return false;
}
}
catch (Exception ex)
{
message = "Cannot put into leaf struct value\n" + ex.Message;
return false;
}
return true;
}