I'm building an R package and have run into a perplexing warning during R CMD check:
* checking for missing documentation entries ... WARNING
Undocumented data sets:
‘.Random.seed’
The package has one small data set, which is documented. I'm using R 3.1.1 and RStudio 0.98.1062 on OS X Yosemite, but I get the same error on Windows 7 (and from CRAN). The project also has a vignette that is built with knitr. devtools etc. are all up to date. The file '.Random.seed' doesn't exist in the "data" folder before building, and my reasoning is that it's getting transiently written to disk during the build process by...something. I tried adding '.Random.seed' to .Rbuildignore without success, presumably because it doesn't exist when the build process begins.
Has anyone encountered this before?