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Clair Ch
mooc-rr
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35a7ff4a
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35a7ff4a
authored
Apr 13, 2020
by
Clair Ch
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Module 3
Module 3
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---
title: "Analyse de l'incidence du syndrôle grippal"
author : "Clair Ch"
date : "13/04/2020"
output: html_document
---
```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```
Je télécharge les données du site sentinelles en ignorant la première ligne qui contient les commentaires
```{r}
data_url<-"http://www.sentiweb.fr/datasets/incidence-PAY-3.csv"
data<-read.csv(data_url, skip=1)
head(data)
```
les colonnes qui nous intéressent sont "week" (1ère colonne, attention les données sont dans l'ordre chronologique inverse) et "inc" (3ème colonne, incidence du syndrome grippal)
est-ce qu'il y a des points manquants ?
```{r}
lignes_na<-apply(data,1,function(x) any(is.na(x)))
data[lignes_na,]
```
Il manque les données de l'année 1989 semaine 19
Vérifier le type de données des colonnes qui nous intéressent
```{r}
class(data$week)
class(data$inc)
```
Ce sont bien des entiers, tout va bien
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