documented use

diff --git a/samples/c/tree_engine.cpp b/samples/c/tree_engine.cpp
index e6b060c..fc577da 100644 (file)
--- a/samples/c/tree_engine.cpp
+++ b/samples/c/tree_engine.cpp
@@ -1,8 +1,20 @@
 #include "opencv2/ml/ml.hpp"
 #include <stdio.h>
-/*
-The sample demonstrates how to use different decision trees.
-*/
+
+void help()
+{
+       printf(
+               "\nThis sample demonstrates how to use different decision trees and forests including boosting and random trees:\n"
+               "CvDTree dtree;\n"
+               "CvBoost boost;\n"
+               "CvRTrees rtrees;\n"
+               "CvERTrees ertrees;\n"
+               "CvGBTrees gbtrees;\n"
+               "Date is hard coded to come from filename = \"../../../OpenCV/samples/c/waveform.data\";\n"
+               "Or can come from filename = \"../../../OpenCV/samples/c/waveform.data\";\n"
+               "Call:\n"
+               "./tree_engine\n\n");
+}
 void print_result(float train_err, float test_err, const CvMat* var_imp)
 {
     printf( "train error    %f\n", train_err );