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david-hammond/ipak.R

Forked from stevenworthington/ipak.R
Last active January 26, 2018 05:50
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Install and load multiple R packages at once
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ipak.R
# ipak function: install and load multiple R packages.
# check to see if packages are installed. Install them if they are not, then load them into the R session.
ipak <- function(pkg){
new.pkg <- pkg[!(pkg %in% installed.packages()[, "Package"])]
if (length(new.pkg))
install.packages(new.pkg, dependencies = TRUE)
sapply(pkg, require, character.only = TRUE)
}
# usage
#packages <- c("ggplot2", "plyr", "reshape2", "RColorBrewer", "scales", "grid")
#ipak(packages)
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