diff --git a/module3/exo3/exercice.ipynb b/module3/exo3/exercice.ipynb
index 0bbbe371b01e359e381e43239412d77bf53fb1fb..64a26d1a05e0484314bb7c82f5e5ac0436d99222 100644
--- a/module3/exo3/exercice.ipynb
+++ b/module3/exo3/exercice.ipynb
@@ -1,25 +1,301 @@
{
- "cells": [],
+ "cells": [
+ {
+ "cell_type": "markdown",
+ "metadata": {
+ "hideCode": false,
+ "hidePrompt": false
+ },
+ "source": [
+ "# Sujet 1 : Concentration de CO2 dans l'atmosphère depuis 1958"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Traitement des données : pre-processing"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 26,
+ "metadata": {
+ "hideCode": false,
+ "hidePrompt": false
+ },
+ "outputs": [],
+ "source": [
+ "%matplotlib inline\n",
+ "import matplotlib.pyplot as plt\n",
+ "import pandas as pd\n",
+ "import isoweek\n",
+ "import numpy as np"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {
+ "hideCode": false,
+ "hidePrompt": false
+ },
+ "source": [
+ "Extraction des données depuis l'url et création d'une copie locale :"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 3,
+ "metadata": {
+ "hideCode": false,
+ "hidePrompt": false
+ },
+ "outputs": [],
+ "source": [
+ "data_url = 'https://scrippsco2.ucsd.edu/assets/data/atmospheric/stations/in_situ_co2/weekly/weekly_in_situ_co2_mlo.csv'"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 4,
+ "metadata": {
+ "hideCode": false,
+ "hidePrompt": false
+ },
+ "outputs": [],
+ "source": [
+ "# read data from url (and delete header)\n",
+ "raw_data = pd.read_csv(data_url, skiprows=44, names=['date','CO2'])\n",
+ "# path for local copy\n",
+ "file = '/home/jovyan/work/module3/exo3/weekly_in_situ_co2_mlo.csv'\n",
+ "# check existing local copy\n",
+ "try:\n",
+ " local_data = pd.read_csv(file)\n",
+ "# if no local copy, create it\n",
+ "except FileNotFoundError:\n",
+ " raw_data.to_csv('weekly_in_situ_co2_mlo.csv')\n",
+ "# read local copy\n",
+ "raw_data = pd.read_csv('weekly_in_situ_co2_mlo.csv')"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {
+ "hideCode": false,
+ "hidePrompt": false
+ },
+ "source": [
+ "Vérification et suppression de données manquantes :"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 5,
+ "metadata": {
+ "hideCode": false,
+ "hidePrompt": false
+ },
+ "outputs": [
+ {
+ "data": {
+ "text/html": [
+ "\n",
+ "\n",
+ "
\n",
+ " \n",
+ " \n",
+ " | \n",
+ " Unnamed: 0 | \n",
+ " date | \n",
+ " CO2 | \n",
+ "
\n",
+ " \n",
+ " \n",
+ " \n",
+ "
\n",
+ "