Sep 16th, 2008| 04:34 pm | Posted by hlee
Astronomers tend to think in Bayesian way, but their Bayesian implementation is very limited. OpenBUGS, WinBUGS, GeoBUGS (BUGS for geostatistics; for example, modeling spatial distribution), R2WinBUGS (R BUGS wrapper) or PyBUGS (Python BUGS wrapper) could boost their Bayesian eagerness. Oh, by the way, BUGS stands for Bayesian inference Using Gibbs Sampling. Continue reading ‘BUGS’ »
Tags:
openBUGS,
PyBUGS,
Python,
R,
toolbox,
winBUGS Category:
Algorithms,
Bayesian,
Data Processing,
Languages,
MCMC,
Methods,
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Aug 27th, 2008| 08:08 pm | Posted by hlee
PyIMSL is a collection of Python wrappers to the math and statistical algorithms in the IMSL C Numerical Library[]. I recall the days of digging in IMSL (International Mathematics and Statistics Library) user manuals and learning Fortran and C to use this vast library (Splus was to slow at that time). Upon knowing that Python is very favored among astronomers (click here to see the slog posts about Python) and that limits exist in Numerical Recipes (I didn’t check the latest version published last year, though), probably IMSL is useful for mathematical and statistical analysis for astronomers.
To know more, Continue reading ‘PyIMSL’ »
May 13th, 2008| 03:47 pm | Posted by hlee
The brackets could be filled with other languages but two are introduced today: Perl (perl.org) and Python (python.org). These two are widely used among astronomers and can be empowered by R (r-project.org). Continue reading ‘R-[{Perl,Python}] Interface’ »
Feb 20th, 2008| 01:26 pm | Posted by vlk
Sherpa is a fitting environment in which Chandra data (and really, X-ray data from any observatory) can be analyzed. It has just undergone a major update and now runs on python. Or allows python to run. Something like that. It is a very powerful tool, but I can never remember how to use it, and I have an amazing knack for not finding what I need in the documentation. So here is a little cheat sheet (which I will keep updating as and when if I learn more): Continue reading ‘Everybody needs crampons’ »
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Chandra,
cheat sheet,
ciao,
how to,
Python,
Sherpa,
Sherpa4 Category:
Algorithms,
Astro,
Fitting,
Jargon,
Languages |
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Jan 22nd, 2007| 05:08 am | Posted by hlee
Both in astronomy and statistics, python is recognized as a versatile programming language. I asked python tutorials to Alanna. The following is her answer, which looks very useful for those who wish to learn python.
Continue reading ‘Learning Python’ »