Is there any way to check for missing packages and install them in R?

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I want to check the installed packages, and if any package is not installed then I want to install that particular package
Apr 17, 2018 in Data Analytics by CodingByHeart77
• 3,690 points
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1 answer to this question.

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There are 2 options:

Either you can use the list of packages and compare it to the output from installed.packages(). After that, you can install the missing packages.

list.of.packages <- c("ggplot2", "Rcpp")
new.packages <- list.of.packages[!(list.of.packages %in% installed.packages()[,"Package"])]
if(length(new.packages)) install.packages(new.packages)

OR

You can out your code in a package and make them as dependencies. So they will automatically be installed when you install the required package.

answered Apr 17, 2018 by nirvana
• 3,060 points

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