diff --git a/notebooks/local_outlier_factor.ipynb b/notebooks/local_outlier_factor.ipynb
new file mode 100644
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--- /dev/null
+++ b/notebooks/local_outlier_factor.ipynb
@@ -0,0 +1,713 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Local outlier factor - Gabbar"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "%matplotlib inline\n",
+    "%config InlineBackend.figure_format = 'retina'\n",
+    "\n",
+    "import warnings\n",
+    "warnings.filterwarnings(\"ignore\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "import pandas as pd\n",
+    "import numpy as np\n",
+    "import matplotlib.pyplot as plt\n",
+    "import seaborn as sns"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from sklearn.externals import joblib\n",
+    "from sklearn.neighbors import NearestNeighbors\n",
+    "\n",
+    "from sklearn.metrics import classification_report\n",
+    "from sklearn.metrics import confusion_matrix"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "pd.set_option('display.precision', 2)\n",
+    "pd.set_option('display.max_columns', None)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "random_state = 5\n",
+    "cv = 10"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "non_training_attributes = ['changeset_id', 'changeset_harmful', 'feature_id', 'feature_type']"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Prepare datasets"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "labelled_path = '../downloads/anomaly-detection/labelled/'"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "(2152, 15)\n"
+     ]
+    },
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>changeset_id</th>\n",
+       "      <th>changeset_harmful</th>\n",
+       "      <th>feature_id</th>\n",
+       "      <th>feature_type</th>\n",
+       "      <th>action_create</th>\n",
+       "      <th>action_modify</th>\n",
+       "      <th>action_delete</th>\n",
+       "      <th>feature_version</th>\n",
+       "      <th>highway_tag_created</th>\n",
+       "      <th>highway_tag_deleted</th>\n",
+       "      <th>highway_value_difference</th>\n",
+       "      <th>primary_tags_difference</th>\n",
+       "      <th>area_of_feature_bbox</th>\n",
+       "      <th>length_of_longest_segment</th>\n",
+       "      <th>feature_name_touched</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>819</th>\n",
+       "      <td>47509417</td>\n",
+       "      <td>1</td>\n",
+       "      <td>173213864</td>\n",
+       "      <td>way</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0</td>\n",
+       "      <td>5</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>3074.38</td>\n",
+       "      <td>8.08e-02</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1957</th>\n",
+       "      <td>46428224</td>\n",
+       "      <td>1</td>\n",
+       "      <td>28084835</td>\n",
+       "      <td>way</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0</td>\n",
+       "      <td>7</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>81860.36</td>\n",
+       "      <td>7.76e-02</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>22</th>\n",
+       "      <td>48793277</td>\n",
+       "      <td>1</td>\n",
+       "      <td>493973632</td>\n",
+       "      <td>way</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0</td>\n",
+       "      <td>2</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>83641.75</td>\n",
+       "      <td>2.29e-01</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>616</th>\n",
+       "      <td>47531648</td>\n",
+       "      <td>1</td>\n",
+       "      <td>4409709</td>\n",
+       "      <td>way</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0</td>\n",
+       "      <td>9</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>9303.95</td>\n",
+       "      <td>1.25e-01</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1563</th>\n",
+       "      <td>47303259</td>\n",
+       "      <td>1</td>\n",
+       "      <td>39560764</td>\n",
+       "      <td>way</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0</td>\n",
+       "      <td>5</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1216.48</td>\n",
+       "      <td>7.95e-02</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1340</th>\n",
+       "      <td>47375444</td>\n",
+       "      <td>1</td>\n",
+       "      <td>147200518</td>\n",
+       "      <td>way</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0</td>\n",
+       "      <td>3</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>5954.32</td>\n",
+       "      <td>0.00e+00</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1645</th>\n",
+       "      <td>47271076</td>\n",
+       "      <td>1</td>\n",
+       "      <td>235175103</td>\n",
+       "      <td>way</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0</td>\n",
+       "      <td>6</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>27.42</td>\n",
+       "      <td>8.60e-03</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1507</th>\n",
+       "      <td>47307997</td>\n",
+       "      <td>1</td>\n",
+       "      <td>332091899</td>\n",
+       "      <td>way</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0</td>\n",
+       "      <td>2</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>37047.15</td>\n",
+       "      <td>2.74e-01</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>816</th>\n",
+       "      <td>47509435</td>\n",
+       "      <td>1</td>\n",
+       "      <td>54378535</td>\n",
+       "      <td>way</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0</td>\n",
+       "      <td>7</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>160485.22</td>\n",
+       "      <td>1.91e-01</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>930</th>\n",
+       "      <td>47480390</td>\n",
+       "      <td>1</td>\n",
+       "      <td>39473445</td>\n",
+       "      <td>way</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0</td>\n",
+       "      <td>6</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>616.93</td>\n",
+       "      <td>2.54e-02</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "      changeset_id  changeset_harmful  feature_id feature_type  action_create  \\\n",
+       "819       47509417                  1   173213864          way              0   \n",
+       "1957      46428224                  1    28084835          way              0   \n",
+       "22        48793277                  1   493973632          way              0   \n",
+       "616       47531648                  1     4409709          way              0   \n",
+       "1563      47303259                  1    39560764          way              0   \n",
+       "1340      47375444                  1   147200518          way              0   \n",
+       "1645      47271076                  1   235175103          way              0   \n",
+       "1507      47307997                  1   332091899          way              0   \n",
+       "816       47509435                  1    54378535          way              0   \n",
+       "930       47480390                  1    39473445          way              0   \n",
+       "\n",
+       "      action_modify  action_delete  feature_version  highway_tag_created  \\\n",
+       "819               1              0                5                    0   \n",
+       "1957              1              0                7                    0   \n",
+       "22                1              0                2                    0   \n",
+       "616               1              0                9                    0   \n",
+       "1563              1              0                5                    0   \n",
+       "1340              1              0                3                    0   \n",
+       "1645              1              0                6                    0   \n",
+       "1507              1              0                2                    0   \n",
+       "816               1              0                7                    0   \n",
+       "930               1              0                6                    0   \n",
+       "\n",
+       "      highway_tag_deleted  highway_value_difference  primary_tags_difference  \\\n",
+       "819                     0                         0                        0   \n",
+       "1957                    0                         0                        0   \n",
+       "22                      0                         0                        0   \n",
+       "616                     0                         0                        0   \n",
+       "1563                    0                         0                        0   \n",
+       "1340                    0                         0                        0   \n",
+       "1645                    0                         0                        0   \n",
+       "1507                    0                         0                        0   \n",
+       "816                     0                         0                        0   \n",
+       "930                     0                         0                        0   \n",
+       "\n",
+       "      area_of_feature_bbox  length_of_longest_segment  feature_name_touched  \n",
+       "819                3074.38                   8.08e-02                     0  \n",
+       "1957              81860.36                   7.76e-02                     0  \n",
+       "22                83641.75                   2.29e-01                     0  \n",
+       "616                9303.95                   1.25e-01                     0  \n",
+       "1563               1216.48                   7.95e-02                     0  \n",
+       "1340               5954.32                   0.00e+00                     0  \n",
+       "1645                 27.42                   8.60e-03                     0  \n",
+       "1507              37047.15                   2.74e-01                     0  \n",
+       "816              160485.22                   1.91e-01                     0  \n",
+       "930                 616.93                   2.54e-02                     0  "
+      ]
+     },
+     "execution_count": 8,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "labelled = pd.read_csv(labelled_path + 'attributes.csv')\n",
+    "print(labelled.shape)\n",
+    "\n",
+    "# Sort the dataset randomly.\n",
+    "labelled = labelled.sample(labelled.shape[0], random_state=random_state)\n",
+    "labelled.sample(10)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Shape before dropping duplicates: (2152, 15)\n",
+      "Shape after dropping duplicates: (2152, 15)\n"
+     ]
+    }
+   ],
+   "source": [
+    "# Drop all duplicate samples.\n",
+    "print('Shape before dropping duplicates: {}'.format(labelled.shape))\n",
+    "labelled = labelled.drop_duplicates(subset=['changeset_id', 'feature_id'])\n",
+    "print('Shape after dropping duplicates: {}'.format(labelled.shape))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 10,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Total inliers: (2099, 15)\n",
+      "Total outliers: (53, 15)\n"
+     ]
+    }
+   ],
+   "source": [
+    "inliers = labelled[labelled['changeset_harmful'] == 1]\n",
+    "print('Total inliers: {}'.format(inliers.shape))\n",
+    "\n",
+    "outliers = labelled[labelled['changeset_harmful'] == -1]\n",
+    "print('Total outliers: {}'.format(outliers.shape))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Model training"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 11,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "NearestNeighbors(algorithm='auto', leaf_size=30, metric='minkowski',\n",
+       "         metric_params=None, n_jobs=1, n_neighbors=5, p=2, radius=1.0)"
+      ]
+     },
+     "execution_count": 11,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "model = NearestNeighbors()\n",
+    "model.fit(labelled.drop(non_training_attributes, axis=1))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Inliers"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>changeset_id</th>\n",
+       "      <th>changeset_harmful</th>\n",
+       "      <th>feature_id</th>\n",
+       "      <th>feature_type</th>\n",
+       "      <th>action_create</th>\n",
+       "      <th>action_modify</th>\n",
+       "      <th>action_delete</th>\n",
+       "      <th>feature_version</th>\n",
+       "      <th>highway_tag_created</th>\n",
+       "      <th>highway_tag_deleted</th>\n",
+       "      <th>highway_value_difference</th>\n",
+       "      <th>primary_tags_difference</th>\n",
+       "      <th>area_of_feature_bbox</th>\n",
+       "      <th>length_of_longest_segment</th>\n",
+       "      <th>feature_name_touched</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>2140</th>\n",
+       "      <td>44929925</td>\n",
+       "      <td>-1</td>\n",
+       "      <td>21868906</td>\n",
+       "      <td>way</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0</td>\n",
+       "      <td>5</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>16</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1.08e+03</td>\n",
+       "      <td>0.14</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>126</th>\n",
+       "      <td>48255854</td>\n",
+       "      <td>-1</td>\n",
+       "      <td>490323405</td>\n",
+       "      <td>way</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0</td>\n",
+       "      <td>2</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>9.48e+04</td>\n",
+       "      <td>0.05</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2130</th>\n",
+       "      <td>45018087</td>\n",
+       "      <td>-1</td>\n",
+       "      <td>247378462</td>\n",
+       "      <td>way</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0</td>\n",
+       "      <td>15</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>11</td>\n",
+       "      <td>0</td>\n",
+       "      <td>5.19e+06</td>\n",
+       "      <td>0.08</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2131</th>\n",
+       "      <td>45017819</td>\n",
+       "      <td>-1</td>\n",
+       "      <td>456458523</td>\n",
+       "      <td>way</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0</td>\n",
+       "      <td>4</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1.01e+07</td>\n",
+       "      <td>0.13</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>73</th>\n",
+       "      <td>48388526</td>\n",
+       "      <td>-1</td>\n",
+       "      <td>491268465</td>\n",
+       "      <td>way</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0</td>\n",
+       "      <td>2</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>-1</td>\n",
+       "      <td>0</td>\n",
+       "      <td>1.72e+04</td>\n",
+       "      <td>0.13</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "      changeset_id  changeset_harmful  feature_id feature_type  action_create  \\\n",
+       "2140      44929925                 -1    21868906          way              0   \n",
+       "126       48255854                 -1   490323405          way              0   \n",
+       "2130      45018087                 -1   247378462          way              0   \n",
+       "2131      45017819                 -1   456458523          way              0   \n",
+       "73        48388526                 -1   491268465          way              0   \n",
+       "\n",
+       "      action_modify  action_delete  feature_version  highway_tag_created  \\\n",
+       "2140              1              0                5                    0   \n",
+       "126               1              0                2                    0   \n",
+       "2130              1              0               15                    0   \n",
+       "2131              1              0                4                    0   \n",
+       "73                1              0                2                    0   \n",
+       "\n",
+       "      highway_tag_deleted  highway_value_difference  primary_tags_difference  \\\n",
+       "2140                    0                        16                        0   \n",
+       "126                     0                         0                        1   \n",
+       "2130                    0                        11                        0   \n",
+       "2131                    0                         1                        0   \n",
+       "73                      0                        -1                        0   \n",
+       "\n",
+       "      area_of_feature_bbox  length_of_longest_segment  feature_name_touched  \n",
+       "2140              1.08e+03                       0.14                     0  \n",
+       "126               9.48e+04                       0.05                     0  \n",
+       "2130              5.19e+06                       0.08                     0  \n",
+       "2131              1.01e+07                       0.13                     0  \n",
+       "73                1.72e+04                       0.13                     0  "
+      ]
+     },
+     "execution_count": 12,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "labelled[labelled.changeset_harmful == -1].head()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 13,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "(array([[  0.        ,  16.01992315,  16.05116334,  17.69844641,\n",
+       "          18.80077688]]), array([[ 114, 1447, 1441, 1986, 1661]]))"
+      ]
+     },
+     "execution_count": 13,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "model.kneighbors(labelled[labelled.changeset_id == 44929925].drop(non_training_attributes, axis=1))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 18,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "changeset_id                  47432011\n",
+       "changeset_harmful                    1\n",
+       "feature_id                   343328885\n",
+       "feature_type                       way\n",
+       "action_create                        0\n",
+       "action_modify                        1\n",
+       "action_delete                        0\n",
+       "feature_version                      3\n",
+       "highway_tag_created                  0\n",
+       "highway_tag_deleted                  0\n",
+       "highway_value_difference             0\n",
+       "primary_tags_difference              0\n",
+       "area_of_feature_bbox           1.1e+03\n",
+       "length_of_longest_segment        0.038\n",
+       "feature_name_touched                 0\n",
+       "Name: 1071, dtype: object"
+      ]
+     },
+     "execution_count": 18,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "labelled.iloc[1661]"
+   ]
+  }
+ ],
+ "metadata": {
+  "anaconda-cloud": {},
+  "kernelspec": {
+   "display_name": "Python [conda root]",
+   "language": "python",
+   "name": "conda-root-py"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.5.2"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}