High Performance Computing & AI

Practical notes on Python, JupyterHub, Kubernetes and AI for science — from the San Diego Supercomputer Center.

Basic fork/pull git workflow
2013-04-06
Typical simple workflow for a (github) repository with few users.
- git
Interactive 3D plot of a sky map
2013-03-12
update May 2024: See the new version of this tutorial Mayavi is a Python package from Enthought for 3D visualization, here a simple example of creating a 3D interactive map starting from a HEALPix pixelization sky map:
- python
- astrophysics
How to cite HDF5 in bibtex
2013-02-27
here the bibtex entry: reference: https://www.hdfgroup.org/solutions/hdf5/
Compile healpix C++ to javascript
2013-01-28
Compile C++ -> LLVM with clang Convert LLVM -> Javascript: https://github.com/kripken/emscripten/wiki/Tutorial
- linux
Elliptic beams, FWHM and ellipticity
2013-01-18
The relationship between the Full Width Half Max, FWHM (min, max, and average) and the ellipticity is: FWHM = sqrt(FWHMmin FWHMmax) e = FWHMmax/FWHMmin
- astrophysics
Ubuntu PPA for HEALPix and healpy
2012-12-17
HEALPix C, C++ version 3.00 and healpy version 1.4.1 are now available in a PPA repository for Ubuntu 12.04 Precise and Ubuntu 12.10 Quantal.
- healpy
- linux
Butterworth filter with Python
2012-10-06
Using IPython notebook of course: http://nbviewer.ipython.org/3843014/
- python
IPython.parallel for Planck data analysis at NERSC
2012-09-27
Planck is a Space mission for high precision measurements of the Cosmic Microwave Background (CMB), data are received as timestreams of output voltages from the 2 instruments on-board, the Low and High Frequency Instruments [LFI / HFI].
- python
homepage on about.me
2012-09-26
moved my homepage to about.me: http://about.me/andreazonca it is quite nice, and essential, as most of it is just links to other websites, i.e. arXiv for publications, Linkedin for CV, github for code. So I'm going to use andreazonca.com as blog, hosted on blogger.
doctests and unittests happiness 2
2012-08-16
nosetests -v --with-doctest Doctest: healpy.pixelfunc.ang2pix ... ok Doctest: healpy.pixelfunc.getallneighbours ... ok Doctest: healpy.pixelfunc.getinterpval ... ok Doctest: healpy.pixelfunc.getmapsize ... ok Doctest: healpy.pixelfunc.getminvalidnside ... ok Doctest: healpy.pixelfunc.getneighbours ...
- python
compile python module with mpi support
2012-07-06
CC=mpicc LDSHARED="mpicc -shared" python setup.py buildext -i
some python resources
2011-11-01
python tutorial: https://docs.python.org/3/tutorial/ numpy tutorial [arrays]: https://numpy.org/doc/stable/user/quickstart.html plotting tutorial: https://matplotlib.org/stable/tutorials/pyplot.html free online books: https://diveintopython3.net/ https://python.swaroopch.com/ install python (recommended): https://www.a
- python
cfitsio wrapper in python
2011-06-21
After several issues with pyfits, and tired of it being so overengineered, I've wrote my own fits I/O package in python, wrapping the C library cfitsio with ctypes. Pretty easy, first version completely developed in 1 day. https://github.com/zonca/pycfitsio
- python
unit testing happiness
2011-06-21
nosetests -v testallcols (pycfitsio.test.TestPyCfitsIoRead) ... ok testcolnames (pycfitsio.test.TestPyCfitsIoRead) ... ok testmove (pycfitsio.test.TestPyCfitsIoRead) ... ok testopenfile (pycfitsio.test.TestPyCfitsIoRead) ... ok testreadcol (pycfitsio.test.TestPyCfitsIoRead) ...
- python
Pink noise (1/f noise) simulations in numpy
2011-05-18
Pink noise (1/f noise) simulations in numpy
- python