Monthly Archives: May 2010

robot (SPX) DNA Management Techniques

May 18, 2010
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robot (SPX) DNA Management Techniques

Yes, this is related to trading, but no, it is not my thesis on why the Euro is going to parity. Instead, it is sort of a workshop for robot(SPX) developers on how to organize their digital DNA. As you begin to use programming as a money extraction tool on the markets, you'll soon find...

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Confusing slice sampler

May 18, 2010
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Confusing slice sampler

Most embarrassingly, Liaosa Xu from Virginia Tech sent the following email almost a month ago and I forgot to reply: I have a question regarding your example 7.11 in your book Introducing Monte Carlo Methods with R.  To further decompose the uniform simulation by sampling a and b step by step, how you determine the

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R: Dueling normals

May 18, 2010
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R: Dueling normals

More playing around with R. To create the graph above, I sampled 100 times from two different normal distributions, then plotted the ratio of times that the first distribution beat the second one on the y-axis. The second distribution always had a mean of 0, the mean of first distribution went from 0 to 4,

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Parallel Computing with R for Life Sciences

May 18, 2010
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I hadn't heard of the CloudAsia 2010 conference before, but from the programme the workshop Master Class on HPC Application For Life Sciences looked like it was interesting. One workshop session in particular caught my eye: Practical Parallel Computing in R by Xie Chao and Tan Tin Wee (from the National University of Singapore). The workshop notes (PDF) provide...

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Prototype: Web-Friendly Visualizations in R

May 18, 2010
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Developing web-friendly data visualizations is not very difficult, though as far as I know, a package that allows one to do this directly in R does not exist (e-mail me if you know of one). As someone who has been developing lots of data-oriented software tools, it's always nice to post visualizations online. To facilitate

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JAGS 2.1.0 and rjags 2.1.0 are released

May 17, 2010
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JAGS 2.1.0 and rjags 2.1.0 are released

JAGS 2.1.0 is now available from Sourceforge.  You will find the source as well as binary packages for Windows and Mac OS X. Binary packages for Debian are available through the usual Debian channels, and packages for RPM-based Linux distributions … Continue reading →

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House Mountain Hike

May 17, 2010
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House Mountain Hike

My wife Mary and my Dad Wesley and I took a hike this weekend (5/14/10) to the House Mountain state recreation area in Knox county, Tennessee. The hike was about 3.8 miles with a total elevation gain of around 1000 feet (940.23ft by GPS). The plot below gives the elevation profile over the course of

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Random sudokus [test]

May 17, 2010
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Random sudokus [test]

Robin Ryder pointed out to me that 3 is indeed the absolute minimum one could observe because of the block constraint (bon sang, mais c’est bien sûr !). The distribution of the series of 3 digits being independent over blocks, the theoretical distribution under uniformity can easily be simulated: #uniform distribution on the block diagonal

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Rcpp 0.8.0

Romain and I are happy to announce the release of Rcpp version 0.8.0. It has been uploaded to CRAN. A Debian upload is delayed until the now-required inline package is accepted into Debian. The source package is also available from here. This rel...

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Lambda Distribution

May 17, 2010
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(This article was first published on Rmetrics blogs, and kindly contributed to R-bloggers) To leave a comment for the author, please follow the link and comment on their blog: Rmetrics blogs. R-bloggers.com offers daily e-mail updates about R news and tutorials on topics such as: Data science, Big Data, R jobs, visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave,...

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