Index: trunk/Mars/mjtrain/MJTrainCuts.cc
===================================================================
--- trunk/Mars/mjtrain/MJTrainCuts.cc	(revision 9872)
+++ trunk/Mars/mjtrain/MJTrainCuts.cc	(revision 9873)
@@ -133,4 +133,29 @@
 // displayed variables.
 //
+//
+// Example:
+// --------
+//
+//    MJTrainCuts opt;
+//    MDataSet seton ("dataset_on.txt");
+//    MDataSet setoff("dataset_off.txt");
+//    opt.SetDataSetOn(seton);
+//    opt.SetDataSetOff(setmix);
+//    Int_t p00 = opt.AddParameter("MHillas.fSize");
+//    Int_t p01 = opt.AddParameter("MHillas.GetArea*MGeomCam.fConvMm2Deg^2");
+//    opt.AddHist(p00, p01);    // Area vs Size
+//    MStatusDisplay *d = new MStatusDisplay;
+//    opt.SetDisplay(d);
+//    opt.Process("rf-cuts.root");
+//
+//
+// Random Numbers:
+// ---------------
+//   Use:
+//         if(gRandom)
+//             delete gRandom;
+//         gRandom = new TRandom3();
+//   in advance to change the random number generator.
+//
 ////////////////////////////////////////////////////////////////////////////
 #include "MJTrainCuts.h"