From 9b0ef7bb17dc0e5f3b83bd9dc11e1756ce452abb Mon Sep 17 00:00:00 2001
From: berak <px1704@web.de>
Date: Fri, 11 May 2018 11:47:02 +0200
Subject: [PATCH] ml: fix caching of internal state when changing the impl in
 KNearest

---
 modules/ml/src/knearest.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/modules/ml/src/knearest.cpp b/modules/ml/src/knearest.cpp
index 3bf5c6ad28..30a0951bf3 100644
--- a/modules/ml/src/knearest.cpp
+++ b/modules/ml/src/knearest.cpp
@@ -437,7 +437,16 @@ public:
     {
         if (val != BRUTE_FORCE && val != KDTREE)
             val = BRUTE_FORCE;
+
+        int k = getDefaultK();
+        int e = getEmax();
+        bool c = getIsClassifier();
+
         initImpl(val);
+
+        setDefaultK(k);
+        setEmax(e);
+        setIsClassifier(c);
     }
 
 public: