public FeatureInteractions GetFeatureInteractions(int maxInteractionDepth = -1, int maxDeepening = -1)
{
FeatureInteractions xgbFeatureInteractions = new FeatureInteractions();
_maxInteractionDepth = maxInteractionDepth;
_maxDeepening = maxDeepening;
Console.ResetColor();
if (_maxInteractionDepth == -1)
{
Console.WriteLine(String.Format("Collectiong feature interactions"));
}
else
{
Console.WriteLine(String.Format("Collectiong feature interactions up to depth {0}", _maxInteractionDepth));
}
for (int i = 0; i < NumTrees; i++)
{
Console.ForegroundColor = ConsoleColor.DarkGreen;
Console.Write(String.Format("Collectiong feature interactions within tree #{0} ", i + 1));
_treeFeatureInteractions = new FeatureInteractions();
_pathMemo = new HashSet <string>();
_treeIndex = i;
CollectFeatureInteractions(XgbTrees[i], new HashSet <XgbTreeNode>(), currentGain: 0, currentCover: 0, pathProbability: 1, depth: 0, deepening: 0);
//double treeGain = _treeFeatureInteractions.GetFeatureInteractionsOfDepth(0).Sum(x => x.Value.Gain);
//foreach (KeyValuePair<string, FeatureInteraction> fi in _treeFeatureInteractions)
//{
// fi.Value.Gain /= treeGain;
//}
Console.WriteLine(String.Format("=> number of interactions: {0}", _treeFeatureInteractions.Count));
Console.ResetColor();
xgbFeatureInteractions.Merge(_treeFeatureInteractions);
}
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine(String.Format("{0} feature interactions has been collected.\n", xgbFeatureInteractions.Count));
Console.ResetColor();
return(xgbFeatureInteractions);
}