From e7904c8291265819f42380eb9807318f19cc7061 Mon Sep 17 00:00:00 2001
From: ahmedramly <ahmedramly@gmail.com>
Date: Mon, 5 Sep 2022 20:46:58 +0300
Subject: [PATCH] dvars fixing

---
 findoutlie/metrics.py | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/findoutlie/metrics.py b/findoutlie/metrics.py
index 08ba844..c69a095 100644
--- a/findoutlie/metrics.py
+++ b/findoutlie/metrics.py
@@ -2,8 +2,8 @@
 """
 
 # Any imports you need
-# +++your code here+++
-
+import numpy as np
+import nibabel as nib
 
 def dvars(img):
     """ Calculate dvars metric on Nibabel image `img`
@@ -29,4 +29,8 @@ def dvars(img):
     # You may be be able to solve this in four lines, without a loop.
     # But solve it any way you can.
     # This is a placeholder, replace it to write your solution.
-    raise NotImplementedError('Code up this function')
+    data = img.get_fdata()
+    diff = np.diff(data, axis=-1)
+    dvar = np.sqrt(np.mean(diff.reshape(-1, diff.shape[-1])**2, axis=0))
+
+    return dvar