[ArXiv] 3rd week, June 2008
This is my last [ArXiv] series. Continue reading ‘[ArXiv] 3rd week, June 2008’ »
Author Archive
my first AAS. VI. Normalization
One realization of mine during the meeting was related to a cultural difference; therefore, there is no relation to any presentations during the 212th AAS in this post. Please, correct me if you find wrong statements. I cannot cover all perspectives from both disciplines but I think there are two distinct fashions in practicing normalization. Continue reading ‘my first AAS. VI. Normalization’ »
[Q] systematic error
What is systematic error? Can it be modeled statistically? Is it random? Is it fixed? Is it a bias? Is it …? Continue reading ‘[Q] systematic error’ »
my first AAS. V. measurement error and EM
While discussing different view points on the term, clustering, one of the conversers led me to his colleague’s poster. This poster (I don’t remember its title and abstract) was my favorite from all posters in the meeting. Continue reading ‘my first AAS. V. measurement error and EM’ »
my first AAS. IV. clustering
I was questioned by two attendees, acquainted before the AAS, if I can suggest them clustering methods relevant to their projects. After all, we spent quite a time to clarify the term clustering. Continue reading ‘my first AAS. IV. clustering’ »
[ArXiv] 2nd week, June 2008
As Prof. Speed said, PCA is prevalent in astronomy, particularly this week. Furthermore, a paper explicitly discusses R, a popular statistics package. Continue reading ‘[ArXiv] 2nd week, June 2008’ »
my first AAS. III. ANOVA
Believe it or not, I saw ANOVA (ANalysis Of VAriance) from a poster at AAS. This acronym was considered as one of very statistical jargons that one would never see in an astronomical meeting. I think you like to know the story in detail. Continue reading ‘my first AAS. III. ANOVA’ »
my first AAS. II. maximum likelihood test
What is the maximum likelihood test in astronomy? Continue reading ‘my first AAS. II. maximum likelihood test’ »
[ArXiv] 1st week, June 2008
Despite no statistic related discussion, a paper comparing XSPEC and ISIS, spectral analysis open source applications might bring high energy astrophysicists’ interests this week. Continue reading ‘[ArXiv] 1st week, June 2008’ »
my first AAS. I. Regression
My first impression from the 212th AAS meeting is that it’s planned for preparing IYA 2009 and many talks are about current and future project reviews and strategies to reach public (People kept saying to me that winter meetings are more grand with expanded topics). I cannot say I understand everything (If someone says no astronomers understand everything, I’ll be relieved) but thanks to the theme of the meeting, I was intelligently entertained enough in many respects. The downside of this intellectual stimulus is growing doubts. One of those doubts was regression analysis in astronomy. Continue reading ‘my first AAS. I. Regression’ »
[ArXiv] 4th week, May 2008
Eight astro-ph papers and two statistics paper are listed this week. One statistics paper discusses detecting filaments and the other talks about maximum likelihood estimation of satellite images (clouds). Continue reading ‘[ArXiv] 4th week, May 2008’ »
[ArXiv] 3rd week, May 2008
Not many this week, but there’s a great read. Continue reading ‘[ArXiv] 3rd week, May 2008’ »
[ArXiv] 2nd week, May 2008
There’s no particular opening remark this week. Only I have profound curiosity about jackknife tests in [astro-ph:0805.1994]. Including this paper, a few deserve separate discussions from a statistical point of view that shall be posted. Continue reading ‘[ArXiv] 2nd week, May 2008’ »
A Data Miner’s Story
Usama Fayyad (click the image to listen the lecture)
A Data Miner’s Story – Getting to Know the Grand Challenges
Continue reading ‘A Data Miner’s Story’ »
R-[{Perl,Python}] Interface
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’ »