Emgu CV Library Documentation
classIdx Field
NamespacesEmgu.CV.ML.StructureMCvDTreeNodeclassIdx

www.emgu.com/wiki
The assigned to the node normalized class index (to 0..class_count-1 range), it is used internally in classification trees and tree ensembles.
Declaration Syntax
C#Visual BasicVisual C++
public int classIdx
Public classIdx As Integer
public:
int classIdx

Assembly: Emgu.CV.ML (Module: Emgu.CV.ML) Version: 1.0.0.0 (1.0.0.0)