/// <summary>
/// Returns the rescaled (0-100) and sorted variable importance scores with corresponding name
/// </summary>
/// <param name="featureNameToIndex"></param>
/// <returns></returns>
public Dictionary <string, double> GetVariableImportance(Dictionary <string, int> featureNameToIndex)
{
var textTrees = m_model.DumpModelEx(fmap: string.Empty, with_stats: 1, format: "text");
var rawVariableImportance = FeatureImportanceParser.ParseFromTreeDump(textTrees, featureNameToIndex.Count);
var max = rawVariableImportance.Max();
var scaledVariableImportance = rawVariableImportance
.Select(v => (v / max) * 100.0)
.ToArray();
return(featureNameToIndex.ToDictionary(kvp => kvp.Key, kvp => scaledVariableImportance[kvp.Value])
.OrderByDescending(kvp => kvp.Value)
.ToDictionary(kvp => kvp.Key, kvp => kvp.Value));
}
public string[] DumpModelEx(string fmap = "",
int with_stats = 0,
string format = "json")
{
return(booster.DumpModelEx(fmap, with_stats, format));
}