From 96cc28b43932927ec050e8baf960443184b78223 Mon Sep 17 00:00:00 2001
From: Glenn Jocher <glenn.jocher@ultralytics.com>
Date: Mon, 17 Jul 2023 14:12:52 +0200
Subject: [PATCH] Update Classify `fitness` definition to mean of top1, top5
 (#3789)

---
 ultralytics/utils/metrics.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ultralytics/utils/metrics.py b/ultralytics/utils/metrics.py
index cdf9331319..196be69a89 100644
--- a/ultralytics/utils/metrics.py
+++ b/ultralytics/utils/metrics.py
@@ -963,8 +963,8 @@ class ClassifyMetrics(SimpleClass):
 
     @property
     def fitness(self):
-        """Returns top-5 accuracy as fitness score."""
-        return self.top5
+        """Returns mean of top-1 and top-5 accuracies as fitness score."""
+        return (self.top1 + self.top5) / 2
 
     @property
     def results_dict(self):