Modified an example to include a demo and blurb on character case sen…

…sitivity to fix #305
datacarpentry · Nov 12, 2024 · 590068a · 590068a
1 parent 9954090
commit 590068a
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/episodes/01-r-basics.Rmd b/episodes/01-r-basics.Rmd
@@ -751,12 +751,15 @@ the vector you are searching:
 # current value of 'snp_genes':
 # chr [1:7] "OXTR" "ACTN3" "AR" "OPRM1" "CYP1A1" NA "APOA5"
 
-# test to see if "ACTN3" or "APO5A" is in the snp_genes vector
+# test to see if "ACTN3", "APO5A", or "actn3" is in the snp_genes vector
 # if you are looking for more than one value, you must pass this as a vector
 
-c("ACTN3","APOA5") %in% snp_genes
+c("ACTN3","APOA5", "actn3") %in% snp_genes
 ```
 
+Notice that the gene "actn3" is FALSE? This is because character vectors are case sensitive, so
+keep this in mind when subsetting and selecting values from a character vector. 
+
 :::::::::::::::::::::::::::::::::::::::::  callout
 
 ## Tip: What's the difference between the `%in% and the `==` operators?