Installation

This guide is intended for people who are not currently using Anaconda. If you already have a Python 3 conda environment, skip below to the subsection Installing Software.

Create a Conda Environment

You first need to get the Anaconda module and enter a custom environment.

module load anaconda3

Either enter your preferred conda environment with source activate YOUR_ENV_NAME if you already have one, or create a new one. I call my power spectrum conda environment ps, but you can name it something else if you want, just replace every mention of ps in the instructions below with your desired environment name.

conda create -n ps python=3

Enter your environment. This is what you will type every time you want to compute some spectra (and in your SLURM power spectrum jobs!).

conda activate ps

You will need to install some other necessary packages into your conda environment, if you just created it. Note that we are using -n to specify the conda environment!

conda install -n ps matplotlib cython numpy scipy astropy pillow

If you are running on a machine with Jupyter like cori or niagara, we also set up ipykernel so your conda environment shows up in Jupyter. You can do this on tiger too (see Jupyter on the Cluster).

conda install -n ps ipykernel
python -m ipykernel install --user \
   --name ps --display-name "Python 3 (ps)"

Installing Software

We now install the power spectrum software. Install NaMaster with

conda install -c conda-forge namaster -n ps

You also need to install pixell for CAR map manipulation. This involves cloning a GitHub repository, so for convenience you might want to set up your SSH keys on GitHub. If you are on niagara, you will also need to module load autotools to get autoconf before installing pixell. Go to the directory where you keep your software, and run

pip install pixell --user

You also need healpy to manipulate healpix maps.

pip install healpy

Then install nawrapper (these routines for ACT power spectrum analysis). Return to the directory where you keep your software, and then run

git clone git@github.com:xzackli/nawrapper.git
cd nawrapper
pip install -e . --user

You should be all set! Try out the Getting Started.

Updating NaWrapper

To get new version of NaWrapper in the future, you’ll have to run git pull in the nawrapper repository you had cloned earlier. Since you installed with -e using pip, this is all you have to do.

Working on Tiger/Della

I maintain module files for ACT analysis on the Princeton clusters (Tiger and Della), with instructions available on the ACT wiki (scroll down to the “Power Spectrum Analysis” section). These will let you import the GitHub master branches of pixell, NaMaster (pymaster), and nawrapper by adding some paths to your PYTHONPATH.