/// <summary>
/// Set evidence for a particular node. This is a wrapper for EnterFindings so we can use values instead of indices.
/// </summary>
/// <param name="node">target RV</param>
/// <param name="state">The value of the evindence.</param>
public void Observe(BNode node, int state)
{
try
{
int index = UndefinedState;
for (int i = 0; i < node.NumberStates; i++)
{
if (node.StateLabel[i].Equals(state.ToString()))
{
index = i; //iterating over StateLabels. Names are not set and hence we can't use node.GetStateIndex(str statename)
}
}
node.EnterFinding(index);
}
catch (COMException e)
{
throw new COMException($"No state {state} could be found for node {node.Name}", e);
}
}
static void Main(string[] args)
{
try
{
Console.WriteLine("Welcome to Netica API for C# !");
Netica.Application app = new Netica.Application();
app.Visible = true;
string net_file_name = AppDomain.CurrentDomain.BaseDirectory + "..\\..\\..\\ChestClinic.dne";
Streamer file = app.NewStream(net_file_name, null);
BNet net = app.ReadBNet(file, "");
net.Compile();
BNode TB = net.Node("Tuberculosis");
double bel = TB.GetBelief("present");
Console.WriteLine("The probability of tuberculosis is " + bel.ToString("G4"));
BNode XRay = net.Node("XRay");
XRay.EnterFinding("abnormal");
bel = TB.GetBelief("present");
Console.WriteLine("Given an abnormal X-Ray, the probability of tuberculosis is " + bel.ToString("G4"));
net.Node("VisitAsia").EnterFinding("visit");
bel = TB.GetBelief("present");
Console.WriteLine("Given abnormal X-Ray and visit to Asia, the probability of TB is " + bel.ToString("G4"));
net.Node("Cancer").EnterFinding("present");
bel = TB.GetBelief("present");
Console.WriteLine("Given abnormal X-Ray, Asia visit, and lung cancer, the probability of TB is " + bel.ToString("G4"));
net.Delete();
if (!app.UserControl)
{
app.Quit();
}
}
catch (System.Runtime.InteropServices.COMException e)
{
Console.WriteLine("Netica Demo: Error " + (e.ErrorCode & 0x7FFF) + ": " + e.Message);
}
Console.WriteLine("Press <enter> to quit.");
Console.ReadLine();
}
