When we share an R script file with someone else, we assumed that they have already installed the required R packages. However, this is not always the case and for that reason, I strongly suggest adding this piece of code to every shared R script which requires a package. Let’s assume that your code requires the following three packages: “readxl“, “dplyr“, “multcomp” .

The script below checks, if the package exists, and if not, then it installs it and finally it loads it to R

mypackages<-c("readxl", "dplyr", "multcomp")

for (p in mypackages){
  if(!require(p, character.only = TRUE)){
    install.packages(p)
    library(p, character.only = TRUE)
  }
  }