在R CMD Check的文档对象中没有\ alias的\ usage中的错误对象

I have written a small package for my own use, and using devtools everything has gone very well. However, I tried to run R CMD Check on it, and got a number of errors, seemingly because my usage and examples use functions from base R that aren't in my package, for instance here's my minimal function, and roxygen documentationI have written a small package for my own use,