add library(ggdag)

tgerke · tgerke · commit 4f08df6aeb1b · 2023-07-11T08:19:14.000-07:00
diff --git a/slides/raw/04-dags.qmd b/slides/raw/04-dags.qmd
@@ -112,6 +112,7 @@ knitr::include_graphics("img/tidy_ggdagitty.png")
 ```{r}
 #| eval: false
 #| code-line-numbers: "|2|3"
+library(ggdag)
 dagify(
   cancer ~ smoking, 
   coffee ~ smoking
