Remove/detach a package in a R session

Question

My question is some packages share the same function name. How can I tell R which package that I want to use this function from?

I tried to load the package that I wanted to use again in the code but it still did not work. My case is the select in MASS and dplyr. I want to use dplyr but the error is always unused argument...

Answer 1

You can use the :: operator:

iris %>%
  head(n = 3) %>%
  dplyr::select(Sepal.Length)

See here for details.

Or detach MASS ala this post.