private void ValidateAlgorithmSettings(GbmAlgorithmSettings algoSettings)
{
throw new NotImplementedException();
}
public GbmModelBuildService(GbmAlgorithmSettings algoSettings, ModellingDataSettings dataSettings)
{
_algoSettings = algoSettings;
_dataSettings = dataSettings;
}
private void FindBestCategoricalSplit(BinInfo parent, double parentInformation, BinInfo[] bins, SplitInfo split,
bool doesDefaultExist, GbmAlgorithmSettings algorithmSettings)
{
throw new NotImplementedException();
}
public void FindBestSplit(IDictionary <int, SplitInfo> splits, TreeNodePool pool, GbmAlgorithmSettings algorithmSettings)
{
var nodes = splits.Keys;
foreach (var nodeId in nodes)
{
var parentT = pool.GetBinInfoTraining(nodeId);
var parentTGain = GetLeafSplitGain(parentT);
var binsT = _data[nodeId];
var split = splits[nodeId];
var defaultBinInfo = binsT[0];
var doesDefaultExist = (defaultBinInfo.SumWeights > 0);
split.DefaultIdx = Bin.DefaultIndex;
if (_binType == BinType.Numerical)
{
ScanFromLeft(parentT, parentTGain, binsT, split, doesDefaultExist, algorithmSettings);
if (doesDefaultExist)
{
ScanFromRight(parentT, parentTGain, binsT, split, true, algorithmSettings);
}
}
else if (_binType == BinType.Categorical)
{
FindBestCategoricalSplit(parentT, parentTGain, binsT, split, doesDefaultExist, algorithmSettings);
}
else
{
throw new InvalidOperationException("Invalid BinType enumeration");
}
}
}
private void ScanFromLeft(BinInfo parentT, double parentTGain, BinInfo[] binsT, SplitInfo split, bool doesDefaultExist, GbmAlgorithmSettings algorithmSettings)
{
throw new NotImplementedException();
}