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+---
+title: "Analyse de l'incidence du syndrome grippal"
+author: "Clément MOLINA"
+date: "2023-08-31"
+output: html_document
+---
+
+```{r setup, include=FALSE}
+knitr::opts_chunk$set(echo = TRUE)
+```
+
+```{r}
+data_url = "https://www.sentiweb.fr/datasets/incidence-PAY-3.csv?v=4bf55"
+```
+
+```{r}
+data = read.csv(data_url, skip = 1)
+head(data)
+```
+
+```{r}
+tail(data)
+```
+
+```{r}
+lignes_na = apply(data, 1, function (x) any(is.na(x)))
+data [lignes_na,]
+```
+```{r}
+class(data$week)
+```
+```{r}
+class(data$inc)
+```
+```{r}
+data = read.csv(data_url, skip = 1,na.strings = "-")
+```
+
+```{r}
+lignes_na = apply(data, 1, function (x) any(is.na(x)))
+data [lignes_na,]
+```
+```{r}
+library(parsedate)
+```
+```{r}
+convert_date = function(date) {
+  ws = paste(date)
+  iso = paste0(substring(ws,1,4),"-W",substring(ws,5,6))
+  iso
+  parse_iso_8601(iso)
+}
+```
+
+```{r}
+data$date = sapply(data$week, FUN = convert_date)
+```
+