lookingatdata.blogspot.com
Looking at data: Speeding up R computations Pt III: parallelization
http://lookingatdata.blogspot.com/2013/01/speeding-up-r-computations-pt-iii.html
A blog about statistics, probability, mathematics and data visualization. Tuesday, January 8, 2013. Speeding up R computations Pt III: parallelization. In two previous posts, I have written about how you can speed up your R computations either by using strange notation and non-standard functions. Or by compiling your code. I'll start this post by a very brief introduction to parallelization using the doMC. If you already are familiar with doMC. Parallel programming in R. Modern processors have several co...
lookingatdata.blogspot.com
Looking at data: December 2010
http://lookingatdata.blogspot.com/2010_12_01_archive.html
A blog about statistics, probability, mathematics and data visualization. Monday, December 20, 2010. The mathematics of a beat machine. 2010 has been Swedish pop star Robyn. S year. She's released a three-part album called Body Talk. Been nominated to countless awards and broken new ground with her 3D music video with Twitter integration. One of my favourite tracks on the second installment in the Body Talk. Series is We dance to the beat. In what must surely be a future textbook example of synchronicity.
lookingatdata.blogspot.com
Looking at data: January 2013
http://lookingatdata.blogspot.com/2013_01_01_archive.html
A blog about statistics, probability, mathematics and data visualization. Tuesday, January 8, 2013. Speeding up R computations Pt III: parallelization. In two previous posts, I have written about how you can speed up your R computations either by using strange notation and non-standard functions. Or by compiling your code. I'll start this post by a very brief introduction to parallelization using the doMC. If you already are familiar with doMC. Parallel programming in R. Modern processors have several co...
lookingatdata.blogspot.com
Looking at data: October 2012
http://lookingatdata.blogspot.com/2012_10_01_archive.html
A blog about statistics, probability, mathematics and data visualization. Thursday, October 11, 2012. A reply to Testing via credible sets. Last week I posted a manuscript on arXiv entitled On decision-theoretic justifications for Bayesian hypothesis testing through credible sets. A few days later, a discussion of it appeared on Xi'ans' Og. The main goal of the paper. Was to discuss decision-theoretic justifications for testing the point-null hypothesis Θ. Against the alternative Θ. Is rejected if θ.
lookingatdata.blogspot.com
Looking at data: April 2011
http://lookingatdata.blogspot.com/2011_04_01_archive.html
A blog about statistics, probability, mathematics and data visualization. Wednesday, April 6, 2011. Speeding up R computations. The past few days I've been going through some R. The first thing that I did was that I replaced all parentheses by curly brackets . I was inspired to do so by this post. Over at Radford Neal's blog. As he pointed out, code that uses parentheses is actually slower than the same code with curly brackets:. System.time( for(i in 1:1000000) { 1*(1 1) } ). 1337 0.005 1.349. System&...
lookingatdata.blogspot.com
Looking at data: February 2011
http://lookingatdata.blogspot.com/2011_02_01_archive.html
A blog about statistics, probability, mathematics and data visualization. Tuesday, February 15, 2011. Narcolepsy and the swine flu vaccine. Earlier this year the Finnish National Institute for Health and Wellfare published a report about the increased risk of narcolepsy observed among children and adolescents vaccinated with PandemrixR. Steven Novella at Science-Based Medicine wrote a great piece. Risk for vaccinated child: 52/( n. 07) = 1/ n. Risk for unvaccinated child: 8/( n. 03) = 1/ n. It seems that...
lookingatdata.blogspot.com
Looking at data: July 2012
http://lookingatdata.blogspot.com/2012_07_01_archive.html
A blog about statistics, probability, mathematics and data visualization. Wednesday, July 25, 2012. Online resources for statisticians. My students often look up statistical methods on Wikipedia. Sometimes they admit this with a hint of embarrassment in their voices. They are right to be cautious when using Wikipedia ( not all pages. Are well-written) and I'm therefore pleased when they ask me if there are other good online resources for statisticians. Description of significance tests. Place to go if yo...
lookingatdata.blogspot.com
Looking at data: December 2011
http://lookingatdata.blogspot.com/2011_12_01_archive.html
A blog about statistics, probability, mathematics and data visualization. Wednesday, December 14, 2011. Are Higgs findings due to chance? As media all over the world are reporting. That scientists at CERN may have glimpsed the Higgs particle. For the first time, journalists struggle to explain why the physicists are reluctant to say that the results are conclusive. Unfortunately, they seem to be doing so by grossly misinterpreting one of the key concepts in modern statistics: the p-value. The number of s...
