How to include (source) R script in other scripts

Question

I\'ve created a utility R script, util.R, which I want to use from other scripts in my project. What is the proper way to ensure that the function this script defines are av

Answer 1

Here is one possible way. Use the exists function to check for something unique in your util.R code.

For example:

if(!exists("foo", mode="function")) source("util.R")

(Edited to include mode="function", as Gavin Simpson pointed out)