Package error when running r code on command line

Question

I have some code that I run that includes this part:

if (!require(\"yaml\")) {
  install.packages(\"yaml\") 
  library(\"yaml\")
}

When I run i

Answer 1

RStudio sets a default repository when you call install.packages from within RStudio. When you run the script via the command line, you have to tell R which repository to use (or set a global default repository).

You can easily fix this problem by telling R to use your favorite repository.

For example, if you want to use RStudio's package repository, set repos="http://cran.rstudio.com/" inside the install.packages call.

if (!require("yaml")) {
  install.packages("yaml", repos="http://cran.rstudio.com/") 
  library("yaml")
}

This should work!