CODEWITHSUNDEEP
rpackage
Nirmal
Nirmal

Reputation: 117

Automatically install a new package in R

I have wrote a function for the packages which I have already installed. Within that I just want to write a statement where a new package needs to be installed automatically, once we call it. I want to install ROCR package using this function below.

libraries <- function()

list.of.packages <- c("caTools", "caret", "glmnet","rpart","rpart.plot","randomForest","rattle",
                   "e1071")
new.packs<- if(list.of.packages[!list.of.packages %in% installed.packages() [,"Package"])]{
install.packages("new.packs")
library(new.packs)
}else {
print("All packages installed")

} }

Upvotes: 0

Views: 552

Answers (2)

Henk
Henk

Reputation: 3656

library pacman does this for you.

e.g. 

pacman::p_load(data.table, lubridate)

loads the libraries and installs them if they are not available.

Upvotes: 3

statespace
statespace

Reputation: 1664

How about this general approach:

if(!"caret" %in% installed.packages()) install.packages("caret")

Can be adjusted to your needs, as in getting vector of not yet installed packages and then passing it to install.packages:

list.of.packages <- c("caTools", "caret", "glmnet","rpart","rpart.plot","randomForest","rattle",
                      "e1071")

if(length(which(!list.of.packages %in% installed.packages()))){
  install.packages(list.of.packages[!list.of.packages %in% installed.packages()])
}

Upvotes: 1

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