How to correctly install package from a local folder directory?

Question

I create an R Package project and install it using the following code.

install.packages("f:/Desktop/function/", repos = NULL, type = "source")

However, when I try to attach the package with library(function) , I got

Error: unexpected ')' in "library(function)"

How should I correctly install a custom package?

Answer 1

function is a key command in R that should not be used to create custom objects. It's messing names.

I recommend to change the name of the package.