public void TwoInputs_WeightHalf()
{
var connList = new List <WeightedDirectedConnection <double> >
{
new WeightedDirectedConnection <double>(0, 2, 0.5),
new WeightedDirectedConnection <double>(1, 2, 0.5)
};
// Create graph.
var digraph = WeightedAcyclicDirectedGraphBuilder <double> .Create(connList, 2, 1);
// Create neural net
var actFn = new LogisticFunction();
var net = new AcyclicNeuralNet(digraph, actFn.Fn, false);
// Activate and test.
net.InputVector[0] = 0.0;
net.InputVector[1] = 0.0;
net.Activate();
Assert.AreEqual(0.5, net.OutputVector[0]);
// Activate and test.
net.InputVector[0] = 1.0;
net.InputVector[1] = 2.0;
net.Activate();
Assert.AreEqual(actFn.Fn(1.5), net.OutputVector[0]);
// Activate and test.
net.InputVector[0] = 10.0;
net.InputVector[1] = 20.0;
net.Activate();
Assert.AreEqual(actFn.Fn(15.0), net.OutputVector[0]);
}
public void MultipleInputsOutputs()
{
var connList = new List <WeightedDirectedConnection <double> >
{
new WeightedDirectedConnection <double>(0, 5, 1.0),
new WeightedDirectedConnection <double>(1, 3, 1.0),
new WeightedDirectedConnection <double>(2, 4, 1.0)
};
// Create graph.
var digraph = WeightedAcyclicDirectedGraphBuilder <double> .Create(connList, 3, 3);
// Create neural net
var actFn = new LogisticFunction();
var net = new AcyclicNeuralNet(digraph, actFn.Fn, false);
// Activate and test.
net.InputVector[0] = 1.0;
net.InputVector[1] = 2.0;
net.InputVector[2] = 3.0;
net.Activate();
Assert.AreEqual(actFn.Fn(2.0), net.OutputVector[0]);
Assert.AreEqual(actFn.Fn(3.0), net.OutputVector[1]);
Assert.AreEqual(actFn.Fn(1.0), net.OutputVector[2]);
}
public void SingleInput_WeightOne()
{
var connList = new List <WeightedDirectedConnection <double> >();
connList.Add(new WeightedDirectedConnection <double>(0, 1, 1.0));
// Create graph.
var digraph = WeightedAcyclicDirectedGraphBuilder <double> .Create(connList, 1, 1);
// Create neural net
var actFn = new LogisticFunction();
var net = new AcyclicNeuralNet(digraph, actFn.Fn, false);
// Activate and test.
net.InputVector[0] = 0.0;
net.Activate();
Assert.AreEqual(0.5, net.OutputVector[0]);
// Activate and test.
net.InputVector[0] = 1.0;
net.Activate();
Assert.AreEqual(actFn.Fn(1), net.OutputVector[0]);
// Activate and test.
net.InputVector[0] = 10.0;
net.Activate();
Assert.AreEqual(actFn.Fn(10.0), net.OutputVector[0]);
}
public void SingleInput_WeightZero()
{
var connList = new List <WeightedDirectedConnection <double> >();
connList.Add(new WeightedDirectedConnection <double>(0, 1, 0.0));
// Create graph.
var digraph = WeightedAcyclicDirectedGraphBuilder <double> .Create(connList, 1, 1);
// Create neural net
var actFn = new LogisticFunction();
var net = new AcyclicNeuralNet(digraph, actFn.Fn, false);
// Note. The single connection weight is zero, so the input value has no affect.
// Activate and test.
net.InputVector[0] = 100.0;
net.Activate();
Assert.AreEqual(0.5, net.OutputVector[0]);
// Activate and test.
net.InputVector[0] = 0;
net.Activate();
Assert.AreEqual(0.5, net.OutputVector[0]);
// Activate and test.
net.InputVector[0] = -100;
net.Activate();
Assert.AreEqual(0.5, net.OutputVector[0]);
}
public void Complex_WeightOne()
{
var connList = new List <WeightedDirectedConnection <double> >
{
new WeightedDirectedConnection <double>(0, 4, 1.0),
new WeightedDirectedConnection <double>(1, 4, 1.0),
new WeightedDirectedConnection <double>(1, 5, 1.0),
new WeightedDirectedConnection <double>(3, 4, 1.0),
new WeightedDirectedConnection <double>(4, 2, 0.9),
new WeightedDirectedConnection <double>(5, 3, 1.0)
};
// Create graph.
var digraph = WeightedAcyclicDirectedGraphBuilder <double> .Create(connList, 2, 2);
// Create neural net
var actFn = new LogisticFunction();
var net = new AcyclicNeuralNet(digraph, actFn.Fn, false);
// Activate and test.
net.InputVector[0] = 0.5;
net.InputVector[1] = 0.25;
net.Activate();
double output1 = actFn.Fn(actFn.Fn(0.25));
Assert.AreEqual(output1, net.OutputVector[1]);
double output0 = actFn.Fn(actFn.Fn(output1 + 0.5 + 0.25) * 0.9);
Assert.AreEqual(output0, net.OutputVector[0]);
}
public void HiddenNode()
{
var connList = new List <WeightedDirectedConnection <double> >
{
new WeightedDirectedConnection <double>(0, 3, 0.5),
new WeightedDirectedConnection <double>(1, 3, 0.5),
new WeightedDirectedConnection <double>(3, 2, 2.0)
};
// Create graph.
var digraph = WeightedAcyclicDirectedGraphBuilder <double> .Create(connList, 2, 1);
// Create neural net
var actFn = new LogisticFunction();
var net = new AcyclicNeuralNet(digraph, actFn.Fn, false);
// Activate and test.
net.InputVector[0] = 0.0;
net.InputVector[1] = 0.0;
net.Activate();
Assert.AreEqual(actFn.Fn(1.0), net.OutputVector[0]);
// Activate and test.
net.InputVector[0] = 0.5;
net.InputVector[1] = 0.25;
net.Activate();
Assert.AreEqual(actFn.Fn(actFn.Fn(0.375) * 2.0), net.OutputVector[0]);
}
public void DepthNodeReorderTest()
{
// Define graph connections.
var connList = new List <WeightedDirectedConnection <double> >
{
new WeightedDirectedConnection <double>(0, 4, 0.0),
new WeightedDirectedConnection <double>(4, 5, 1.0),
new WeightedDirectedConnection <double>(5, 2, 2.0),
new WeightedDirectedConnection <double>(1, 2, 3.0),
new WeightedDirectedConnection <double>(2, 3, 4.0)
};
// Create graph.
connList.Sort(WeightedDirectedConnectionComparer <double> .Default);
var digraph = WeightedAcyclicDirectedGraphBuilder <double> .Create(connList, 2, 2);
// The nodes should have IDs allocated based on depth, i.e. the layer they are in.
// And connections should be ordered by source node ID.
var connListExpected = new List <WeightedDirectedConnection <double> >
{
new WeightedDirectedConnection <double>(0, 2, 0.0),
new WeightedDirectedConnection <double>(1, 4, 3.0),
new WeightedDirectedConnection <double>(2, 3, 1.0),
new WeightedDirectedConnection <double>(3, 4, 2.0),
new WeightedDirectedConnection <double>(4, 5, 4.0)
};
// Compare actual and expected connections.
CompareConnectionLists(connListExpected, digraph.ConnectionIdArrays, digraph.WeightArray);
// Test layer info.
LayerInfo[] layerArrExpected = new LayerInfo[5];
layerArrExpected[0] = new LayerInfo(2, 2);
layerArrExpected[1] = new LayerInfo(3, 3);
layerArrExpected[2] = new LayerInfo(4, 4);
layerArrExpected[3] = new LayerInfo(5, 5);
layerArrExpected[4] = new LayerInfo(6, 5);
Assert.AreEqual(5, digraph.LayerArray.Length);
// Check the node count.
Assert.AreEqual(6, digraph.TotalNodeCount);
}
public void SimpleAcyclic()
{
// Simple acyclic graph.
var connList = new List <WeightedDirectedConnection <double> >
{
new WeightedDirectedConnection <double>(0, 3, 0.0),
new WeightedDirectedConnection <double>(1, 3, 1.0),
new WeightedDirectedConnection <double>(2, 3, 2.0),
new WeightedDirectedConnection <double>(2, 4, 3.0)
};
// Create graph.
var digraph = WeightedAcyclicDirectedGraphBuilder <double> .Create(connList, 3, 2);
// The graph should be unchanged from the input connections.
CompareConnectionLists(connList, digraph.ConnectionIdArrays, digraph.WeightArray);
// Check the node count.
Assert.AreEqual(5, digraph.TotalNodeCount);
}
