Dear Christine,
Looking at the chunk that causes the error
https://github.com/cran/SleepCycles/blob/141186934418af387f0af257e3079af588e72844/vignettes/introduction.Rmd#L50-L56
(via the CRAN mirror maintained by R-hub):
* You should not install packages from a vignette. You can add "eval=FALSE"
Dear community,
When building my package 'SleepCycles' using devtools::check,
devtools::check_win_devel, and devtools::check_rhub, I do not get warnings,
errors, or notes. Nevertheless, there seems to be an error when building the
vignettes eventually
(https://cran-archive.r-project.org/web/ch
