diff --git a/datasets/raise/split_and_compare_prnus_of_subgroups.py b/datasets/raise/split_and_compare_prnus_of_subgroups.py
old mode 100644
new mode 100755
index 11010a6..65b7c70
--- a/datasets/raise/split_and_compare_prnus_of_subgroups.py
+++ b/datasets/raise/split_and_compare_prnus_of_subgroups.py
@@ -1,3 +1,5 @@
+#!/usr/bin/python3
+
 from PIL import Image
 import numpy as np
 import matplotlib.pyplot as plt
@@ -32,8 +34,6 @@ for subgroupIndex in tqdm(range(NUMBER_OF_SUBGROUPS), 'Subgroup'):
         imagePil = Image.open(imagePath)
         imageNpArray = img_as_float(np.array(imagePil))
         imagePrnuEstimateNpArray = imageNpArray - denoise(imageNpArray, DENOISER)
-        imagesPrnuEstimateNpArray += [imagePrnuEstimateNpArray]
-
         subgroupIterativeMean.add(imagePrnuEstimateNpArray)
         subgroupPrnuEstimateNpArray += [subgroupIterativeMean.mean]