public void Test(string testFile, string resultFile)
{
StreamWriter sw = new StreamWriter(resultFile);
sw.AutoFlush = true;
// write the first line, which specifies names of attributes
foreach (Attribute attr in Globals.attrs)
sw.Write(attr.name + "\t");
sw.WriteLine();
StreamReader sr = new StreamReader(testFile);
sr.ReadLine(); // ignore first line
string line = null;
while ((line = sr.ReadLine()) != null)
{
string[] words = line.Split('\t');
Tuple t = new Tuple();
for (int i=0; i<words.Length; ++i)
{
t.values[i] = Globals.attrs[i].values[words[i]];
sw.Write(words[i] + "\t");
}
int classLabel = ClassifyTuple(t);
Attribute classAttr = Globals.attrs[Globals.attrCount-1];
foreach (string val in classAttr.values.Keys)
{
if (classLabel == classAttr.values[val])
{
sw.WriteLine(val);
}
}
}
sr.Close();
sw.Close();
}
public void AddTuple(Tuple t)
{
tuples.Add(t);
}
public int Traverse(Tuple t)
{
int attrIdx = splitAttrIdx;
int attrVal = t.values[attrIdx];
/* When there are no child nodes */
if (childNodes.Count == 0)
return classLabel; // majority voting
foreach (Node childNode in childNodes)
{
if (childNode.splitAttrVal == attrVal)
{
return childNode.Traverse(t);
}
}
/* Whgen not matched value with child nodes */
return classLabel; // majority voting
}
/* Add tuples to the root node */
private void AddTuplesForRootNode()
{
// return to start position
trainSr.BaseStream.Position = 0;
trainSr.DiscardBufferedData();
trainSr.ReadLine(); // ignore the first line
string line = null;
while ((line = trainSr.ReadLine()) != null)
{
Tuple t = new Tuple();
string[] words = line.Split('\t');
for (int i=0, length=Globals.attrCount; i<length; ++i)
{
try {
t.values[i] = Globals.attrs[i].values[words[i]];
} catch (IndexOutOfRangeException e) {
Console.WriteLine(e.StackTrace);
System.Environment.Exit(-1);
}
}
rootNode.AddTuple(t);
}
}
public int ClassifyTuple(Tuple t)
{
return rootNode.Traverse(t);
}