public static INode GenerateNode(NodeContext context)
{
INode result = null;
if (context.DepthLevel > 20)
{
result = new ConstantNode(context.GenerateNewLevel());
return result;
}
int probability = 10;
while (result == null)
{
if (RandomUtil.Random.Next(100) < probability)
{
result = new AddNode(context.GenerateNewLevel());
}
else if (RandomUtil.Random.Next(100) < probability)
{
result = new SubtractNode(context.GenerateNewLevel());
}
else if (RandomUtil.Random.Next(100) < probability)
{
result = new MultiplyNode(context.GenerateNewLevel());
}
else if (RandomUtil.Random.Next(100) < probability)
{
result = new DivideNode(context.GenerateNewLevel());
}
else if (RandomUtil.Random.Next(100) < probability)
{
result = new InputSizeNode(context.GenerateNewLevel());
}
else if (RandomUtil.Random.Next(100) < probability)
{
result = new CollectionSizeNode(context.GenerateNewLevel());
}
else if (RandomUtil.Random.Next(100) < probability && context.AvailableInputs.Count > 0)
{
result = new InputVariableNode(context.GenerateNewLevel());
}
else if (RandomUtil.Random.Next(100) < probability && context.AvailableCollections.Count > 0)
{
result = new SumNode(context.GenerateNewLevel());
}
}
//NodeFactory.SimplifyNode(ref result);
return result;
}
private INode MakeVarianceNode()
{
INode mean1 = this.MakeMeanNode();
INode mean2 = this.MakeMeanNode();
INode left1 = new InputVariableNode(0, new NodeContext());
INode left2 = new InputVariableNode(0, new NodeContext());
INode sub1 = new SubtractNode(new NodeContext(), left1, mean1);
INode sub2 = new SubtractNode(new NodeContext(), left2, mean2);
INode mult = new MultiplyNode(new NodeContext(), sub1, sub2);
INode sum = new SumNode(new NodeContext(), 0, mult);
INode divide = new DivideNode(new NodeContext(), sum, new CollectionSizeNode(0, new NodeContext()));
return divide;
}