From d9d7895947caa88037012b46ee3a928ee2a9ed8b Mon Sep 17 00:00:00 2001
From: Arkadiusz Kondas <arkadiusz.kondas@gmail.com>
Date: Tue, 19 Apr 2016 22:54:15 +0200
Subject: [PATCH] force implementation of protected functon in Predictable
 trait

---
 src/Phpml/Classifier/KNearestNeighbors.php  | 2 +-
 src/Phpml/Classifier/NaiveBayes.php         | 2 +-
 src/Phpml/Classifier/Traits/Predictable.php | 7 +++++++
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/Phpml/Classifier/KNearestNeighbors.php b/src/Phpml/Classifier/KNearestNeighbors.php
index 4747dc3..ad5aebe 100644
--- a/src/Phpml/Classifier/KNearestNeighbors.php
+++ b/src/Phpml/Classifier/KNearestNeighbors.php
@@ -44,7 +44,7 @@ class KNearestNeighbors implements Classifier
      *
      * @return mixed
      */
-    private function predictSample(array $sample)
+    protected function predictSample(array $sample)
     {
         $distances = $this->kNeighborsDistances($sample);
 
diff --git a/src/Phpml/Classifier/NaiveBayes.php b/src/Phpml/Classifier/NaiveBayes.php
index 4eeb865..cf8dcaa 100644
--- a/src/Phpml/Classifier/NaiveBayes.php
+++ b/src/Phpml/Classifier/NaiveBayes.php
@@ -16,7 +16,7 @@ class NaiveBayes implements Classifier
      *
      * @return mixed
      */
-    private function predictSample(array $sample)
+    protected function predictSample(array $sample)
     {
         $predictions = [];
         foreach ($this->labels as $index => $label) {
diff --git a/src/Phpml/Classifier/Traits/Predictable.php b/src/Phpml/Classifier/Traits/Predictable.php
index 8090f8c..6f5df6a 100644
--- a/src/Phpml/Classifier/Traits/Predictable.php
+++ b/src/Phpml/Classifier/Traits/Predictable.php
@@ -24,4 +24,11 @@ trait Predictable
 
         return $predicted;
     }
+
+    /**
+     * @param array $sample
+     *
+     * @return mixed
+     */
+    abstract protected function predictSample(array $sample);
 }