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Package Management

The doAzureParallel package allows you to install packages to your pool in two ways:

  • Installing on pool creation
  • Installing per-foreach loop

Installing Packages on Pool Creation

You can install packages by specifying the package(s) in your JSON pool configuration file. This will then install the specified packages at the time of pool creation.

{
  ...
  "rPackages": {
    "cran": ["some_cran_package_name", "some_other_cran_package_name"],
    "github": ["github_username/github_package_name", "another_github_username/another_github_package_name"]
  },
  ...
}

Installing Packages per-foreach Loop

You can also install packages by using the .packages option in the foreach loop. Instead of installing packages during pool creation, packages (and it's dependencies) can be installed before each iteration in the loop is run on your Azure cluster.

To install a single package:

number_of_iterations <- 10
results <- foreach(i = 1:number_of_iterations, .packages='some_package') %dopar% { ... }

To install multiple packages:

number_of_iterations <- 10
results <- foreach(i = 1:number_of_iterations, .packages=c('package_1', 'package_2')) %dopar% { ... }

Installing packages from github using this method is not yet supported.

Uninstalling packages

Uninstalling packages from your pool is not supported. However, you may consider rebuilding your pool.