From f1a073e7427df1f635f5247dd81a66d1428531a3 Mon Sep 17 00:00:00 2001
From: hpolvech <helene.polveche@ens-lyon.fr>
Date: Thu, 14 Oct 2021 11:11:02 +0200
Subject: [PATCH] correction r balises
---
session_4/session_4.Rmd | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/session_4/session_4.Rmd b/session_4/session_4.Rmd
index 4ef3102..feeb7a6 100644
--- a/session_4/session_4.Rmd
+++ b/session_4/session_4.Rmd
@@ -314,10 +314,12 @@ select(flights, contains("_") & !starts_with("sched") & !starts_with("time"))
```
</p>
</details>
-- What does the `one_of()` function do? Why might it be helpful in conjunction with this vector?
+- What does the `one_of()` function do? Why might it be helpful in conjunction with this vector?
+
```{r select_one_of, eval=T, message=F, cache=T}
vars <- c("year", "month", "day", "dep_delay", "arr_delay")
```
+
<details><summary>Solution</summary>
<p>
```{r challenge_select_b, eval=FALSE}
@@ -325,6 +327,7 @@ select(flights, one_of(vars))
```
</p>
</details>
+
- Does the result of running the following code surprise you? How do the select helpers deal with case by default? How can you change that default?
```{r select_contains, eval=F, message=F, cache=T}
select(flights, contains("TIME"))
--
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