[R Check for missing packages and install them] Place at the beginning of the R script to check for missing packages and install them (and only in option2 load them) #R

Option1_base.R

# from: https://stackoverflow.com/questions/4090169/elegant-way-to-check-for-missing-packages-and-install-them
# This checks for missing packages and installs them. You will need to load them manually
list.of.packages <- c("ggplot2", "magrittr")
new.packages <- list.of.packages[!(list.of.packages %in% installed.packages()[,"Package"])]
if(length(new.packages)) install.packages(new.packages)

# library(ggplot2)

Option2_pacman.R

# This checks for missing packages, installs them and loads them.
if (!require("pacman")) install.packages("pacman")
list.of.packages <- c("ggplot2", "magrittr")
pacman::p_load(list.of.packages, character.only = TRUE)