Table of Contents

Cluster Software

The list of currently installed software on the cluster. If you wish to have additional software installed, please email econcluster@umd.edu.

Software Version Terminal Command
GCC 11.4.1 gcc
Matlab R2023a matlab
Python 3.9 python
Python 3.11 python3.11
R 4.4.2 R
Stata 18 MP8 stata-mp

Python

To run a pre-written python script, type

python script.py

Installing Libraries via VENV

To install a library that doesn't come with the initial installation, you first need to create a virtual environment (where $NAME is what you choose to name your virtual environment)

python -m venv $NAME

after creating, activate the environment

source environment_name/bin/activate

(you should now see the environment on the far left of the terminal line). After that, you can simply install any library using pip from the command line

pip install pandas

R

Batch Mode

You can run an R file in batch mode with

R CMD BATCH filename.R

To run your R command in the background, see Managing Jobs.

Installing Packages

To install an R package, type in the interactive mode

install.packages($PACKAGE_NAME)

Introduction to R

The following section comes initially from an introductory talk on R given by Paul Bailey in February 2011. The data used in the examples is located at this link.

R Background

R Pros

R Cons

Read in Data

Getting Help

Summary

summary(dat$num_child)
table(dat$num_child)

Subset Data

dat.lf <- dat[dat$emp %in% c("emp","unemp"),]
dat.hs <- dat.lf[dat.lf$educ==39,]

Linear Models

lm1 <- lm(weekly_earn ~ age + year,data=dat)
summary(lm1)
dat$yearf <- as.factor(dat$year)
lm2 <- lm(weekly_earn ~ age + yearf,data=dat)
summary(lm2)
contrasts(dat$yearf) <- "contr.sum"
lm3 <- lm(weekly_earn ~ age + yearf,data=dat)
summary(lm3)

Aggregate

agg.hs <- aggregate(dat.hs$emps,by=list(dat.lf$yq),mean)

Merge

merged <- merge(data.a,data.b)

* Lots of options for this one

Parallel

Some basic info can be found at the High Performance Computing CRAN view. You can use the “parallel” package (which merges both “snow” and “multicore”).

You can also use Rmpi and npRmpi packages. You have your choice of MPI2 libraries (both OpenMPI and MPICH2). You will have to install the packages in your userspace (requiring compilation).

OpenMPIMPICH2
Before anything (installation or usage)>module load openmpi-x86_64>module load mpich2-x86_64
Installation R> install.packages(“<package>”, configure.args=“–with-Rmpi-include=/usr/lib64/openmpi/1.4-gcc/include –with-Rmpi-libpath=/usr/lib64/openmpi/1.4-gcc/lib –with-Rmpi-type=OPENMPI”)R> install.packages(“<package>”, configure.args=“-with-Rmpi-include=/usr/include/mpich2-x86_64 –with-Rmpi-libpath=/usr/lib64/mpich2/lib –with-Rmpi-type=MPICH”)

A good intro guide is npRmpi: A package for parallel distributed kernel estimation in R.

Other functions

Stata

Batch Mode

You can run a .do file in batch mode with

stata-mp -b do dofile.do

To allow your do-file to continue running when you log off from your terminal, preface the command with “nohup”. For example:

nohup stata-mp -b do dofile.do &

For more information on how to run your Stata command in the background, see Managing Jobs

Temporary Files

By default, Stata saves tempfiles (from -tempfile- or -preserve-) to /nfs/home/$USERNAME/stata-tmp/. If you would like Stata to save temporary files in a new location (e.g. $HOME/statatmp) then from the command-line execute the follow before executing Stata:

export STATATMP=$HOME/statatmp 

One reason you might want to do this is that files are removed from /home/stata-tmp/ if they haven't been touched for a day. If you have a Stata process that runs for longer this may cause problems with reading from tempfiles or -restore-.

Installing Extra Packages

If you are using extra packages on your home/work computer and need them installed on the cluster, you can install them via ssc:

ssc install outreg

You will then have a folder installed within your home directory called “ado”, which contains your new commands filed away.