BwUniCluster2.0/Software/R

R
module load	math/R
Availability	bwUniCluster
License	GPL
Citing
Links	Homepage; Documentation
Graphical Interface	No
Included in module

Description

R is a language and environment for statistical computing and graphics. It is a GNU project which is similar to the S language and environment which was developed at Bell Laboratories (formerly AT&T, now Lucent Technologies) by John Chambers and colleagues. R can be considered as a different implementation of S. There are some important differences, but much code written for S runs unaltered under R.

R provides a wide variety of statistical (linear and nonlinear modelling, classical statistical tests, time-series analysis, classification, clustering, …) and graphical techniques, and is highly extensible. The S language is often the vehicle of choice for research in statistical methodology, and R provides an Open Source route to participation in that activity.

One of R’s strengths is the ease with which well-designed publication-quality plots can be produced, including mathematical symbols and formulae where needed. Great care has been taken over the defaults for the minor design choices in graphics, but the user retains full control.

R is available as Free Software under the terms of the Free Software Foundation’s GNU General Public License in source code form. It compiles and runs on a wide variety of UNIX platforms and similar systems (including FreeBSD and Linux), Windows and MacOS.

Versions and Availability

A current list of the versions available on the bwUniCluster and bwForClusters can be obtained from the Cluster Information System: CIS Information on R

On the command line interface of any bwHPC cluster, a list of the available R versions using

$ module avail math/R

Usage

The R installation also provides the standalone library libRmath. This library allows you to access R routines from your own C or C++ programs (see section 9 of the 'R Installation and Administration' manual.)

Loading the module

You can load the default version of R with the command

$ module load math/R

The module will try to load modules it needs to function (e.g. compiler/intel). If loading the module fails, check if you have already loaded one of those modules, but not in the version needed for R.

If you wish to load a specific (older) version, you can do so using e.g.

$ module load math/R/3.1.2

to load the version 3.1.2.

Program Binaries

Standard usage:

Usage: R [options] [< infile] [> outfile]
    R CMD command [arguments]
  
Example: R CMD BATCH script.R

Executing R in batch mode:

R CMD BATCH --no-save --no-restore <INPUT_FILE>.R

For help run

R --help

For command help run

R CMD command --help

Further informations and help

Man pages:          'man R' and 'man Rscript'
Info pages. e.g.:   'info R-intro' or 'info R-FAQ'
Manuals:               $R_DOC_DIR/manual

Examples

As with all processes that require more than a few minutes to run, non-trivial compute jobs must be submitted to the cluster queuing system.

Example scripts are available in the directory $R_EXA_DIR:

$ module show math/R                                                                  # show environment variables, which will be available after 'module load'
$ module load math/R                                                                    # load module
$ ls $R_EXA_DIR                                                                           # show content of directory $R_EXA_DIR
$ cat $R_EXA_DIR/README                                                          # show examples README

Run a first simple example job

$ module load math/R                                                                     # load module
$ mkdir Rtest                                                                                  # create test directory
$ cp $R_EXA_DIR/bwhpc-r.moab $R_EXA_DIR/fit.R Rtest/          # copy example files to test directory
$ cd Rtest/                                                                                     # change to directory
$ nano bwhpc-r.moab                                                                    # change job options, quit with 'CTRL+X'
$ msub bwhpc-r.moab                                                                   # submit job
$ checkjob -v <JOBID>                                                                   # check state of job
$ ls                                                                                                  # when job finishes the results will be visible in this directory

Installing R-Packages into your home folder

Since we cannot provide a software module for every R package, we recommend to install special R packages locally into your home folder. One possibility doing this is shown below:

cp $HOME/.bashrc $HOME/.bashrc.backup                                    # Make a backup copy of your bashrc
echo "export R_LIBS=\"${HOME}/R_libs\"" >> $HOME/.bashrc                 # Setting the environment variable R_LIBS permanently in your bashrc
source $HOME/.bashrc                                                     # Sourcing bashrc to make R_LIBS available 
mkdir $R_LIBS                                                            # Create the R_libs folder in your HOME directory  
module load math/R                                                       # Loading the matlab software module
R                                                                        # Loading R
install.packages('package_name', repos="http://cran.r-project.org")      # Installing your R package and the dependencies 
library(package_name)                                                    # Loading the package into you R instance

The package is now installed permanently in your home folder and is available every time you start R.

You can restore your old .bashrc if something goes wrong with:

$ mv $HOME/.bashrc.backup $HOME/.bashrc      # Restoring the original bashrc

Installed packages can be deleted by deleting the folder ${HOME}/R_libs.

Version-Specific Information

For information specific to a single version, see the information available via the module system with the command

$ module help math/R