Anaconda

Anaconda is a package manager, originally developed for Python, but now used by several software platforms to manage package installation.

One such software platform is R, a widely used application for statistical analysis and plotting, which is greatly extensible by loading packages.

For more information, see "Introduction to Conda for (Data) Scientists" from The Carpentries.

Anaconda commands

This table summarizes useful Anaconda commands:

Command	Description
`conda create –n <env_name>`	Creates a conda environment by name
`conda create –p <env_path>`	Creates a conda environment by location
`conda env list`	Lists all conda environments
`conda env remove –n <env_name>`	Removes a conda environment
`conda activate <env_name>`	Activates a conda environment
`conda list`	Lists all packages in the active environment
`conda deactivate`	Deactivates the active environment
`conda install <package>`	Installs a package in the active environment
`conda search <package>`	Searches for a package
`conda env export > env_name.yml`	Save the active environment to a file
`conda env create –f env_name.yml`	Loads an environment from a file

Anaconda in batch scripts

To initialize Anaconda for use in batch scripts, your .bashrc file must be executed.
This can be done in one of three ways:

source ~/.bashrc executes your .bashrc file;
load your environment with source activate <environmentName>;
begin your script with #!/bin/bash, which executes your .bashrc file.

Example: R packages

To use Anaconda to manage the installation of R, first load its module:

module load anaconda

Next, create an Anaconda "environment" (set of applications and packages) with R as a "base":

conda create -y -n <environmentName> r-base

If you want some R package always to be loaded, include it in the package list:

conda create -y -n <environmentName> r-base r-plot3d r-ggplot

To activate an Anaconda environment:

conda activate <environmentName>

Within an active environment, to load a package, execute

conda install <package>

Anaconda on Portal

If you want to use conda environments for Python or R in a Portal interactive session, special considerations apply. (see also Portal custom environments).

Jupyter Server

The Jupyter Server can be used with a pre-defined Python environment, which you select from the "Environment type" dropdown menu that appears as you configure the session.

To use your own conda environment in a Jupyter Server session, select "Use custom text field", which will contain

module load anaconda3

For this to work, the ipykernel package must be installed into your environment beforehand. To do this, in a terminal session execute:

conda activate <environment>
conda install -y ipykernel
ipython kernel install --user --name=<environment>

When the session begins, your environment is displayed in the kernel list.

RStudio

Likewise, RStudio can be used with a default environment, selected from the "Environment selection" dropdown menu. When the session starts, additional R packages can be installed from an extensive list.

To use a custom environment in an RStudio session, select "Use custom text field", and enter:

module load anaconda
conda activate <environment>
export CONDAENVLIB=$WORK/.conda/envs/<environment>/lib
export LD_LIBRARY_PATH=$CONDAENVLIB:$LD_LIBRARY_PATH

The export commands help RStudio find some libraries while accessing the conda environment's R installation. The default location for conda environments is $WORK/.conda/envs. If your environment is installed elsewhere, CONDAENVLIB should be set accordingly.