diff --git a/nbs/2. Topic Modeling with NMF and SVD.ipynb b/nbs/2. Topic Modeling with NMF and SVD.ipynb
index 9b09ca1..96f17ed 100644
--- a/nbs/2. Topic Modeling with NMF and SVD.ipynb	
+++ b/nbs/2. Topic Modeling with NMF and SVD.ipynb	
@@ -2477,7 +2477,10 @@
     }
    ],
    "source": [
-    "plt.plot(range(0,n*step,step), error)"
+    "plt.plot(range(0,n*step,step), error)\n",
+    "plt.title('Error vs Number of topics')\n",
+    "plt.xlabel('Number of topics')\n",
+    "plt.ylabel('Error')"
    ]
   },
   {
@@ -2624,21 +2627,21 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "Python 2",
    "language": "python",
-   "name": "python3"
+   "name": "python2"
   },
   "language_info": {
    "codemirror_mode": {
     "name": "ipython",
-    "version": 3
+    "version": 2
    },
    "file_extension": ".py",
    "mimetype": "text/x-python",
    "name": "python",
    "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython3",
-   "version": "3.6.1"
+   "pygments_lexer": "ipython2",
+   "version": "2.7.12"
   }
  },
  "nbformat": 4,