diff --git "a/module2/exo4/Suivi de la temp\303\251rature chambre froide avril 2010.xlsx" "b/module2/exo4/Suivi de la temp\303\251rature chambre froide avril 2010.xlsx"
new file mode 100644
index 0000000000000000000000000000000000000000..599613f7e3119759b83686e646ee7d7f4f566f09
Binary files /dev/null and "b/module2/exo4/Suivi de la temp\303\251rature chambre froide avril 2010.xlsx" differ
diff --git a/module2/exo4/exercice.ipynb b/module2/exo4/exercice.ipynb
index c21391e21900539c88b7d2070f416d91e7536708..3c085a4702adffde0c0549730a6ca379deb9e157 100644
--- a/module2/exo4/exercice.ipynb
+++ b/module2/exo4/exercice.ipynb
@@ -202,6 +202,988 @@
     "plt.show()"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Test chargement des données"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 10,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>SUIVI DE LA TEMPERATURE DE LA CHAMBRE FROIDE DU 01/04/2010 AU 30/04/2010</th>\n",
+       "      <th>Unnamed: 1</th>\n",
+       "      <th>Unnamed: 2</th>\n",
+       "      <th>Unnamed: 3</th>\n",
+       "      <th>Unnamed: 4</th>\n",
+       "      <th>Unnamed: 5</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>Mesure</td>\n",
+       "      <td>Date</td>\n",
+       "      <td>Heure</td>\n",
+       "      <td>[°C] chambre froide</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>858</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>00:17:33</td>\n",
+       "      <td>5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>859</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>02:17:33</td>\n",
+       "      <td>6.3</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>860</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>04:17:33</td>\n",
+       "      <td>5.3</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>5</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>861</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>06:17:33</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>6</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>862</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>08:17:33</td>\n",
+       "      <td>6.7</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>7</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>863</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>10:17:33</td>\n",
+       "      <td>4.4</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>8</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>864</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>12:17:33</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>9</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>865</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>14:17:33</td>\n",
+       "      <td>8.6</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>10</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>866</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>16:17:33</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>11</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>867</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>18:17:33</td>\n",
+       "      <td>4.7</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>12</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>868</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>20:17:33</td>\n",
+       "      <td>7.2</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>13</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>869</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>22:17:33</td>\n",
+       "      <td>5.3</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>14</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>870</td>\n",
+       "      <td>2010-04-02 00:00:00</td>\n",
+       "      <td>00:17:33</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>15</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>871</td>\n",
+       "      <td>2010-04-02 00:00:00</td>\n",
+       "      <td>02:17:33</td>\n",
+       "      <td>6.9</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>16</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>872</td>\n",
+       "      <td>2010-04-02 00:00:00</td>\n",
+       "      <td>04:17:33</td>\n",
+       "      <td>4.9</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>17</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>873</td>\n",
+       "      <td>2010-04-02 00:00:00</td>\n",
+       "      <td>06:17:33</td>\n",
+       "      <td>4.8</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>18</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>874</td>\n",
+       "      <td>2010-04-02 00:00:00</td>\n",
+       "      <td>08:17:33</td>\n",
+       "      <td>7.1</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>19</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>875</td>\n",
+       "      <td>2010-04-02 00:00:00</td>\n",
+       "      <td>10:17:33</td>\n",
+       "      <td>4.9</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>20</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>876</td>\n",
+       "      <td>2010-04-02 00:00:00</td>\n",
+       "      <td>12:17:33</td>\n",
+       "      <td>4.9</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>21</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>877</td>\n",
+       "      <td>2010-04-02 00:00:00</td>\n",
+       "      <td>14:17:33</td>\n",
+       "      <td>6.5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>22</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>878</td>\n",
+       "      <td>2010-04-02 00:00:00</td>\n",
+       "      <td>16:17:33</td>\n",
+       "      <td>6.1</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>23</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>879</td>\n",
+       "      <td>2010-04-02 00:00:00</td>\n",
+       "      <td>18:17:33</td>\n",
+       "      <td>4.8</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>24</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>880</td>\n",
+       "      <td>2010-04-02 00:00:00</td>\n",
+       "      <td>20:17:33</td>\n",
+       "      <td>6.5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>25</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>881</td>\n",
+       "      <td>2010-04-02 00:00:00</td>\n",
+       "      <td>22:17:33</td>\n",
+       "      <td>4.8</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>26</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>882</td>\n",
+       "      <td>2010-04-03 00:00:00</td>\n",
+       "      <td>00:17:33</td>\n",
+       "      <td>4.6</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>27</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>883</td>\n",
+       "      <td>2010-04-03 00:00:00</td>\n",
+       "      <td>02:17:33</td>\n",
+       "      <td>7</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>28</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>884</td>\n",
+       "      <td>2010-04-03 00:00:00</td>\n",
+       "      <td>04:17:33</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>29</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>885</td>\n",
+       "      <td>2010-04-03 00:00:00</td>\n",
+       "      <td>06:17:33</td>\n",
+       "      <td>5.1</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>337</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1193</td>\n",
+       "      <td>2010-04-28 00:00:00</td>\n",
+       "      <td>22:17:33</td>\n",
+       "      <td>5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>338</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1194</td>\n",
+       "      <td>2010-04-29 00:00:00</td>\n",
+       "      <td>00:17:33</td>\n",
+       "      <td>4.7</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>339</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1195</td>\n",
+       "      <td>2010-04-29 00:00:00</td>\n",
+       "      <td>02:17:33</td>\n",
+       "      <td>5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>340</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1196</td>\n",
+       "      <td>2010-04-29 00:00:00</td>\n",
+       "      <td>04:17:33</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>341</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1197</td>\n",
+       "      <td>2010-04-29 00:00:00</td>\n",
+       "      <td>06:17:33</td>\n",
+       "      <td>4.6</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>342</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1198</td>\n",
+       "      <td>2010-04-29 00:00:00</td>\n",
+       "      <td>08:17:33</td>\n",
+       "      <td>5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>343</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1199</td>\n",
+       "      <td>2010-04-29 00:00:00</td>\n",
+       "      <td>10:17:33</td>\n",
+       "      <td>4.6</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>344</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1200</td>\n",
+       "      <td>2010-04-29 00:00:00</td>\n",
+       "      <td>12:17:33</td>\n",
+       "      <td>5.3</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>345</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1201</td>\n",
+       "      <td>2010-04-29 00:00:00</td>\n",
+       "      <td>14:17:33</td>\n",
+       "      <td>5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>346</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1202</td>\n",
+       "      <td>2010-04-29 00:00:00</td>\n",
+       "      <td>16:17:33</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>347</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1203</td>\n",
+       "      <td>2010-04-29 00:00:00</td>\n",
+       "      <td>18:17:33</td>\n",
+       "      <td>5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>348</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1204</td>\n",
+       "      <td>2010-04-29 00:00:00</td>\n",
+       "      <td>20:17:33</td>\n",
+       "      <td>4.8</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>349</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1205</td>\n",
+       "      <td>2010-04-29 00:00:00</td>\n",
+       "      <td>22:17:33</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>350</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1206</td>\n",
+       "      <td>2010-04-30 00:00:00</td>\n",
+       "      <td>00:17:33</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>351</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1207</td>\n",
+       "      <td>2010-04-30 00:00:00</td>\n",
+       "      <td>02:17:33</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>352</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1208</td>\n",
+       "      <td>2010-04-30 00:00:00</td>\n",
+       "      <td>04:17:33</td>\n",
+       "      <td>4.7</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>353</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1209</td>\n",
+       "      <td>2010-04-30 00:00:00</td>\n",
+       "      <td>06:17:33</td>\n",
+       "      <td>5.1</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>354</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1210</td>\n",
+       "      <td>2010-04-30 00:00:00</td>\n",
+       "      <td>08:17:33</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>355</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1211</td>\n",
+       "      <td>2010-04-30 00:00:00</td>\n",
+       "      <td>10:17:33</td>\n",
+       "      <td>5.3</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>356</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1212</td>\n",
+       "      <td>2010-04-30 00:00:00</td>\n",
+       "      <td>12:17:33</td>\n",
+       "      <td>4.9</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>357</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1213</td>\n",
+       "      <td>2010-04-30 00:00:00</td>\n",
+       "      <td>14:17:33</td>\n",
+       "      <td>4.8</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>358</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1214</td>\n",
+       "      <td>2010-04-30 00:00:00</td>\n",
+       "      <td>16:17:33</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>359</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1215</td>\n",
+       "      <td>2010-04-30 00:00:00</td>\n",
+       "      <td>18:17:33</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>360</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1216</td>\n",
+       "      <td>2010-04-30 00:00:00</td>\n",
+       "      <td>20:17:33</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>361</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>1217</td>\n",
+       "      <td>2010-04-30 00:00:00</td>\n",
+       "      <td>22:17:33</td>\n",
+       "      <td>5.1</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>362</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>363</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>364</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>Valeur min (°C)</td>\n",
+       "      <td>4.2</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>365</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>Valeur max (°C)</td>\n",
+       "      <td>8.6</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>366</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>Moyenne (°C)</td>\n",
+       "      <td>5.20278</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>367 rows × 6 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     SUIVI DE LA TEMPERATURE DE LA CHAMBRE FROIDE DU 01/04/2010 AU 30/04/2010  \\\n",
+       "0                                                  NaN                          \n",
+       "1                                                  NaN                          \n",
+       "2                                                  NaN                          \n",
+       "3                                                  NaN                          \n",
+       "4                                                  NaN                          \n",
+       "5                                                  NaN                          \n",
+       "6                                                  NaN                          \n",
+       "7                                                  NaN                          \n",
+       "8                                                  NaN                          \n",
+       "9                                                  NaN                          \n",
+       "10                                                 NaN                          \n",
+       "11                                                 NaN                          \n",
+       "12                                                 NaN                          \n",
+       "13                                                 NaN                          \n",
+       "14                                                 NaN                          \n",
+       "15                                                 NaN                          \n",
+       "16                                                 NaN                          \n",
+       "17                                                 NaN                          \n",
+       "18                                                 NaN                          \n",
+       "19                                                 NaN                          \n",
+       "20                                                 NaN                          \n",
+       "21                                                 NaN                          \n",
+       "22                                                 NaN                          \n",
+       "23                                                 NaN                          \n",
+       "24                                                 NaN                          \n",
+       "25                                                 NaN                          \n",
+       "26                                                 NaN                          \n",
+       "27                                                 NaN                          \n",
+       "28                                                 NaN                          \n",
+       "29                                                 NaN                          \n",
+       "..                                                 ...                          \n",
+       "337                                                NaN                          \n",
+       "338                                                NaN                          \n",
+       "339                                                NaN                          \n",
+       "340                                                NaN                          \n",
+       "341                                                NaN                          \n",
+       "342                                                NaN                          \n",
+       "343                                                NaN                          \n",
+       "344                                                NaN                          \n",
+       "345                                                NaN                          \n",
+       "346                                                NaN                          \n",
+       "347                                                NaN                          \n",
+       "348                                                NaN                          \n",
+       "349                                                NaN                          \n",
+       "350                                                NaN                          \n",
+       "351                                                NaN                          \n",
+       "352                                                NaN                          \n",
+       "353                                                NaN                          \n",
+       "354                                                NaN                          \n",
+       "355                                                NaN                          \n",
+       "356                                                NaN                          \n",
+       "357                                                NaN                          \n",
+       "358                                                NaN                          \n",
+       "359                                                NaN                          \n",
+       "360                                                NaN                          \n",
+       "361                                                NaN                          \n",
+       "362                                                NaN                          \n",
+       "363                                                NaN                          \n",
+       "364                                                NaN                          \n",
+       "365                                                NaN                          \n",
+       "366                                                NaN                          \n",
+       "\n",
+       "          Unnamed: 1           Unnamed: 2 Unnamed: 3           Unnamed: 4  \\\n",
+       "0                NaN                  NaN        NaN                  NaN   \n",
+       "1             Mesure                 Date      Heure  [°C] chambre froide   \n",
+       "2                858  2010-04-01 00:00:00   00:17:33                    5   \n",
+       "3                859  2010-04-01 00:00:00   02:17:33                  6.3   \n",
+       "4                860  2010-04-01 00:00:00   04:17:33                  5.3   \n",
+       "5                861  2010-04-01 00:00:00   06:17:33                  4.5   \n",
+       "6                862  2010-04-01 00:00:00   08:17:33                  6.7   \n",
+       "7                863  2010-04-01 00:00:00   10:17:33                  4.4   \n",
+       "8                864  2010-04-01 00:00:00   12:17:33                  4.5   \n",
+       "9                865  2010-04-01 00:00:00   14:17:33                  8.6   \n",
+       "10               866  2010-04-01 00:00:00   16:17:33                  4.5   \n",
+       "11               867  2010-04-01 00:00:00   18:17:33                  4.7   \n",
+       "12               868  2010-04-01 00:00:00   20:17:33                  7.2   \n",
+       "13               869  2010-04-01 00:00:00   22:17:33                  5.3   \n",
+       "14               870  2010-04-02 00:00:00   00:17:33                  4.5   \n",
+       "15               871  2010-04-02 00:00:00   02:17:33                  6.9   \n",
+       "16               872  2010-04-02 00:00:00   04:17:33                  4.9   \n",
+       "17               873  2010-04-02 00:00:00   06:17:33                  4.8   \n",
+       "18               874  2010-04-02 00:00:00   08:17:33                  7.1   \n",
+       "19               875  2010-04-02 00:00:00   10:17:33                  4.9   \n",
+       "20               876  2010-04-02 00:00:00   12:17:33                  4.9   \n",
+       "21               877  2010-04-02 00:00:00   14:17:33                  6.5   \n",
+       "22               878  2010-04-02 00:00:00   16:17:33                  6.1   \n",
+       "23               879  2010-04-02 00:00:00   18:17:33                  4.8   \n",
+       "24               880  2010-04-02 00:00:00   20:17:33                  6.5   \n",
+       "25               881  2010-04-02 00:00:00   22:17:33                  4.8   \n",
+       "26               882  2010-04-03 00:00:00   00:17:33                  4.6   \n",
+       "27               883  2010-04-03 00:00:00   02:17:33                    7   \n",
+       "28               884  2010-04-03 00:00:00   04:17:33                  4.5   \n",
+       "29               885  2010-04-03 00:00:00   06:17:33                  5.1   \n",
+       "..               ...                  ...        ...                  ...   \n",
+       "337             1193  2010-04-28 00:00:00   22:17:33                    5   \n",
+       "338             1194  2010-04-29 00:00:00   00:17:33                  4.7   \n",
+       "339             1195  2010-04-29 00:00:00   02:17:33                    5   \n",
+       "340             1196  2010-04-29 00:00:00   04:17:33                  4.5   \n",
+       "341             1197  2010-04-29 00:00:00   06:17:33                  4.6   \n",
+       "342             1198  2010-04-29 00:00:00   08:17:33                    5   \n",
+       "343             1199  2010-04-29 00:00:00   10:17:33                  4.6   \n",
+       "344             1200  2010-04-29 00:00:00   12:17:33                  5.3   \n",
+       "345             1201  2010-04-29 00:00:00   14:17:33                    5   \n",
+       "346             1202  2010-04-29 00:00:00   16:17:33                  4.5   \n",
+       "347             1203  2010-04-29 00:00:00   18:17:33                    5   \n",
+       "348             1204  2010-04-29 00:00:00   20:17:33                  4.8   \n",
+       "349             1205  2010-04-29 00:00:00   22:17:33                  4.5   \n",
+       "350             1206  2010-04-30 00:00:00   00:17:33                  4.5   \n",
+       "351             1207  2010-04-30 00:00:00   02:17:33                  4.5   \n",
+       "352             1208  2010-04-30 00:00:00   04:17:33                  4.7   \n",
+       "353             1209  2010-04-30 00:00:00   06:17:33                  5.1   \n",
+       "354             1210  2010-04-30 00:00:00   08:17:33                  4.5   \n",
+       "355             1211  2010-04-30 00:00:00   10:17:33                  5.3   \n",
+       "356             1212  2010-04-30 00:00:00   12:17:33                  4.9   \n",
+       "357             1213  2010-04-30 00:00:00   14:17:33                  4.8   \n",
+       "358             1214  2010-04-30 00:00:00   16:17:33                  4.5   \n",
+       "359             1215  2010-04-30 00:00:00   18:17:33                  4.5   \n",
+       "360             1216  2010-04-30 00:00:00   20:17:33                  4.5   \n",
+       "361             1217  2010-04-30 00:00:00   22:17:33                  5.1   \n",
+       "362              NaN                  NaN        NaN                  NaN   \n",
+       "363              NaN                  NaN        NaN                  NaN   \n",
+       "364  Valeur min (°C)                  4.2        NaN                  NaN   \n",
+       "365  Valeur max (°C)                  8.6        NaN                  NaN   \n",
+       "366     Moyenne (°C)              5.20278        NaN                  NaN   \n",
+       "\n",
+       "     Unnamed: 5  \n",
+       "0           NaN  \n",
+       "1           NaN  \n",
+       "2           NaN  \n",
+       "3           NaN  \n",
+       "4           NaN  \n",
+       "5           NaN  \n",
+       "6           NaN  \n",
+       "7           NaN  \n",
+       "8           NaN  \n",
+       "9           NaN  \n",
+       "10          NaN  \n",
+       "11          NaN  \n",
+       "12          NaN  \n",
+       "13          NaN  \n",
+       "14          NaN  \n",
+       "15          NaN  \n",
+       "16          NaN  \n",
+       "17          NaN  \n",
+       "18          NaN  \n",
+       "19          NaN  \n",
+       "20          NaN  \n",
+       "21          NaN  \n",
+       "22          NaN  \n",
+       "23          NaN  \n",
+       "24          NaN  \n",
+       "25          NaN  \n",
+       "26          NaN  \n",
+       "27          NaN  \n",
+       "28          NaN  \n",
+       "29          NaN  \n",
+       "..          ...  \n",
+       "337         NaN  \n",
+       "338         NaN  \n",
+       "339         NaN  \n",
+       "340         NaN  \n",
+       "341         NaN  \n",
+       "342         NaN  \n",
+       "343         NaN  \n",
+       "344         NaN  \n",
+       "345         NaN  \n",
+       "346         NaN  \n",
+       "347         NaN  \n",
+       "348         NaN  \n",
+       "349         NaN  \n",
+       "350         NaN  \n",
+       "351         NaN  \n",
+       "352         NaN  \n",
+       "353         NaN  \n",
+       "354         NaN  \n",
+       "355         NaN  \n",
+       "356         NaN  \n",
+       "357         NaN  \n",
+       "358         NaN  \n",
+       "359         NaN  \n",
+       "360         NaN  \n",
+       "361         NaN  \n",
+       "362         NaN  \n",
+       "363         NaN  \n",
+       "364         NaN  \n",
+       "365         NaN  \n",
+       "366         NaN  \n",
+       "\n",
+       "[367 rows x 6 columns]"
+      ]
+     },
+     "execution_count": 10,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import numpy as np\n",
+    "import pandas as pd\n",
+    "data = pd.read_excel('Suivi de la température chambre froide avril 2010.xlsx')\n",
+    "data"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 11,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Requirement already satisfied: xlrd in /opt/conda/lib/python3.6/site-packages (1.2.0)\r\n"
+     ]
+    }
+   ],
+   "source": [
+    "!pip install xlrd"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>SUIVI DE LA TEMPERATURE DE LA CHAMBRE FROIDE DU 01/04/2010 AU 30/04/2010</th>\n",
+       "      <th>Unnamed: 1</th>\n",
+       "      <th>Unnamed: 2</th>\n",
+       "      <th>Unnamed: 3</th>\n",
+       "      <th>Unnamed: 4</th>\n",
+       "      <th>Unnamed: 5</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>Mesure</td>\n",
+       "      <td>Date</td>\n",
+       "      <td>Heure</td>\n",
+       "      <td>[°C] chambre froide</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>858</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>00:17:33</td>\n",
+       "      <td>5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>859</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>02:17:33</td>\n",
+       "      <td>6.3</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>860</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>04:17:33</td>\n",
+       "      <td>5.3</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>5</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>861</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>06:17:33</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>6</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>862</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>08:17:33</td>\n",
+       "      <td>6.7</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>7</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>863</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>10:17:33</td>\n",
+       "      <td>4.4</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>8</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>864</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>12:17:33</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>9</th>\n",
+       "      <td>NaN</td>\n",
+       "      <td>865</td>\n",
+       "      <td>2010-04-01 00:00:00</td>\n",
+       "      <td>14:17:33</td>\n",
+       "      <td>8.6</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "   SUIVI DE LA TEMPERATURE DE LA CHAMBRE FROIDE DU 01/04/2010 AU 30/04/2010  \\\n",
+       "0                                                NaN                          \n",
+       "1                                                NaN                          \n",
+       "2                                                NaN                          \n",
+       "3                                                NaN                          \n",
+       "4                                                NaN                          \n",
+       "5                                                NaN                          \n",
+       "6                                                NaN                          \n",
+       "7                                                NaN                          \n",
+       "8                                                NaN                          \n",
+       "9                                                NaN                          \n",
+       "\n",
+       "  Unnamed: 1           Unnamed: 2 Unnamed: 3           Unnamed: 4  Unnamed: 5  \n",
+       "0        NaN                  NaN        NaN                  NaN         NaN  \n",
+       "1     Mesure                 Date      Heure  [°C] chambre froide         NaN  \n",
+       "2        858  2010-04-01 00:00:00   00:17:33                    5         NaN  \n",
+       "3        859  2010-04-01 00:00:00   02:17:33                  6.3         NaN  \n",
+       "4        860  2010-04-01 00:00:00   04:17:33                  5.3         NaN  \n",
+       "5        861  2010-04-01 00:00:00   06:17:33                  4.5         NaN  \n",
+       "6        862  2010-04-01 00:00:00   08:17:33                  6.7         NaN  \n",
+       "7        863  2010-04-01 00:00:00   10:17:33                  4.4         NaN  \n",
+       "8        864  2010-04-01 00:00:00   12:17:33                  4.5         NaN  \n",
+       "9        865  2010-04-01 00:00:00   14:17:33                  8.6         NaN  "
+      ]
+     },
+     "execution_count": 12,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "data.head(10)"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,