diff --git a/slam/testEKF.py b/slam/testEKF.py
index a265cc6..99dad89 100644
--- a/slam/testEKF.py
+++ b/slam/testEKF.py
@@ -13,13 +13,24 @@
 
 class ArucoPoseTracker:
 
-    def __init__(self):
+    def __init__(self,trueX,trueY,trueZ,
+                trueOrientationX,trueOrientationY,trueOrientationZ,trueOrientationW,totalDataPoints):
+
+        # True pose values 
+        self.trueX = trueX
+        self.trueY = trueY
+        self.trueZ = trueZ
+        self.trueOrientationX = trueOrientationX
+        self.trueOrientationY = trueOrientationY
+        self.trueOrientationZ = trueOrientationZ
+        self.trueOrientationW = trueOrientationW
+        self.totalDataPoints = totalDataPoints
 
         # Indices to track how many data points we have read in out of the total
         self.indexRaw = 0
         self.indexEKF = 0
 
-        # Store raw and filtered aruco pose data
+        # Store raw and filtered aruco pose error
         self.arucoRaw = np.zeros((7,total_data_points))
         self.arucoEKF = np.zeros((7,total_data_points))
         self.arucoEKFCov = np.zeros((6,6))
@@ -29,32 +40,32 @@ def __init__(self):
         self.arucoRawMeanAndStd = np.zeros((7,2))
         self.arucoEKFMeanandStd = np.zeros(7,2))
 
-    # Record raw aruco data
+    # Record raw aruco error
     def exportRaw(self,pose):
         
-        # Store raw data in the next open array index
-        self.arucoRaw[0][self.indexRaw] = pose.position.x 
-        self.arucoRaw[1][self.indexRaw] = pose.position.y 
-        self.arucoRaw[2][self.indexRaw] = pose.position.z 
-        self.arucoRaw[3][self.indexRaw] = pose.orientation.x  
-        self.arucoRaw[4][self.indexRaw] = pose.orientation.y 
-        self.arucoRaw[5][self.indexRaw] = pose.orientation.z 
-        self.arucoRaw[6][self.indexRaw] = pose.orientation.w  
+        # Store raw error in the next open array index
+        self.arucoRaw[0][self.indexRaw] = pose.position.x - self.trueX
+        self.arucoRaw[1][self.indexRaw] = pose.position.y - self.trueY
+        self.arucoRaw[2][self.indexRaw] = pose.position.z - self.trueZ
+        self.arucoRaw[3][self.indexRaw] = pose.orientation.x - self.trueOrientationX
+        self.arucoRaw[4][self.indexRaw] = pose.orientation.y - self.trueOrientationY
+        self.arucoRaw[5][self.indexRaw] = pose.orientation.z - self.trueOrientationZ
+        self.arucoRaw[6][self.indexRaw] = pose.orientation.w - self.trueOrientationW
 
         # Increment raw index
         self.indexRaw += 1
 
-    # Record ekf aruco data
+    # Record ekf aruco error
     def exportFiiltered(self,poseWithCovariance):
 
-        # Store ekf pose data in the next open array index
-        self.arucoEKF[0][self.indexEKF] = poseWithCovariance.pose.pose.x 
-        self.arucoEKF[1][self.indexEKF] = poseWithCovariance.pose.pose.y
-        self.arucoEKF[2][self.indexEKF] = poseWithCovariance.pose.pose.z 
-        self.arucoEKF[3][self.indexEKF] = poseWithCovariance.pose.orientation.x 
-        self.arucoEKF[4][self.indexEKF] = poseWithCovariance.pose.orientation.y 
-        self.arucoEKF[5][self.indexEKF] = poseWithCovariance.pose.orientation.z 
-        self.arucoEKF[6][self.indexEKF] = poseWithCovariance.pose.orientation.w 
+        # Store ekf pose error in the next open array index
+        self.arucoEKF[0][self.indexEKF] = poseWithCovariance.pose.pose.x - self.trueX 
+        self.arucoEKF[1][self.indexEKF] = poseWithCovariance.pose.pose.y - self.trueY 
+        self.arucoEKF[2][self.indexEKF] = poseWithCovariance.pose.pose.z - self.trueZ 
+        self.arucoEKF[3][self.indexEKF] = poseWithCovariance.pose.orientation.x - self.trueOrientationX
+        self.arucoEKF[4][self.indexEKF] = poseWithCovariance.pose.orientation.y - self.trueOrientationY
+        self.arucoEKF[5][self.indexEKF] = poseWithCovariance.pose.orientation.z - self.trueOrientationZ
+        self.arucoEKF[6][self.indexEKF] = poseWithCovariance.pose.orientation.w - self.trueOrientationW
 
         # Store ekf covariance data in the next open array index
         self.arucoEKFCov = poseWithCovariance.pose.covariance
@@ -72,9 +83,8 @@ def calculateMeanAndStd(self):
             self.arucoEKFMeanAndStd[x][0] = np.mean(self.arucoEKF[x])
             self.arucoEKFMeanAndStd[x][1] = np.std(self.arucoEKF[x])
 
-            
-
-
+        print(self.arucoRawMeanAndStd)
+        print(self.arucoEKFMeanandStd)
         
 
 # Run ROS Node
@@ -83,17 +93,18 @@ def calculateMeanAndStd(self):
     # Init ros node as test_ekf
     rospy.init_node("test_ekf")
 
-    total_data_points = rospy.get_param("total_data_points")
-    true_x = rospy.get_param("true_x")
-    true_y = rospy.get_param("true_y")
-    true_z = rospy.get_param("true_z")
-    true_orientation_x = rospy.get_param("true_orientation_x")
-    true_orientation_y = rospy.get_param("true_orientation_y")
-    true_orientation_z = rospy.get_param("true_orientation_z")
-    true_orientation_w = rospy.get_param("true_orientation_w")
+    totalDataPoints = rospy.get_param("total_data_points")
+    trueX = rospy.get_param("true_x")
+    trueY = rospy.get_param("true_y")
+    trueZ = rospy.get_param("true_z")
+    trueOrientationX = rospy.get_param("true_orientation_x")
+    trueOrientationY = rospy.get_param("true_orientation_y")
+    trueOrientationZ = rospy.get_param("true_orientation_z")
+    trueOrientationW = rospy.get_param("true_orientation_w")
 
     # Initialize data capture for aruco pose data
-    aruco_pose_tracker = ArucoPoseTracker()
+    aruco_pose_tracker = ArucoPoseTracker(trueX,trueY,trueZ,
+                        trueOrientationX,trueOrientationY,trueOrientationZ,trueOrientationW,totalDataPoints)
 
     while aruco_pose_tracker.indexRaw <= total_data_points and
             aruco_pose_tracker.indexEKF <= total_data_points:
@@ -104,3 +115,4 @@ def calculateMeanAndStd(self):
         rospy.spin()
 
     # Calculate mean and standard deviation once done collecting data. Print to console.
+    aruco_pose_tracker.calculateMeanAndStd()
\ No newline at end of file