YAML parsing error in "2. Getting and Cleaning Data" course "1. Manipulating data with dplyr." lesson.yaml

[Tek-Spec]

I encountered a YAML parsing error when attempting to run Lesson 1: Manipulating data with dplyr from the “Getting and Cleaning Data” course using swirl().

The error message was:

Error in yaml.load(readLines(con, warn = readLines.warn), error.label = error.label, :
(C:/Path/To/File/lesson.yaml) Scanner error: while scanning a tag at line 205, column 9
did not find expected whitespace or line break at line 205, column 19

The issue came from line 205 in lesson.yaml:

Hint: !is.na(c(3, 5, NA, 10)) will negate the previous command, thus telling us what is NOT NA.

This line causes YAML to misinterpret !is.na(...) as a tag. The fix was to wrap the value in quotes:

Hint: "!is.na(c(3, 5, NA, 10)) will negate the previous command, thus telling us what is NOT NA."

This resolved the error and the lesson loaded correctly.

Thanks again for maintaining such a valuable educational tool!