Load packages for simulation-based power calculation

load_pwrc_pkgs.R

#########################################################################
# 'loadpkg' function
# Checks if a vector of packages are installed. If not, installs the
# package. Then loads all packages in vector.
#########################################################################

loadpkg <- function(toLoad){
  for(lib in toLoad){
    if(! lib %in% installed.packages()[,1]) {
      install.packages(lib, repos='http://cran.rstudio.com/')
    }
    suppressMessages( library(lib, character.only=TRUE) )
  }
}

# Load dependencies
pkgs <- c("dplyr",    # for data processing and pipe operators
          "estimatr", # for fast lm() with clustered SEs
          "ggplot2",  # for visualizing power
          ) 

loadpkg(pkgs)