April 2009

opentick is no more

April 17, 2009 | Joshua Ulrich

After a year of "we plan to accept new subscribers shortly", opentick has shut its doors completely. As of March 20th, the opentick service is no longer available.From opentick.com:3/16/2009To opentick subscribers, friends, supporters, contributors an...
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Barry3-Apdex Also Lives in R

April 17, 2009 | Neil Gunther

As a by-product of my presentation on the Apdex Index at the NorCal CMG meeting, back in February, Guerrilla graduate, Stephen O'Connell, went off and did an implementation in R. You can read about it in this month's CMG MeasureIT and download his R-s...
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Webscraping using readLines and RCurl

April 14, 2009 | bryan

There is a massive amount of data available on the web. Some of it is in the form of precompiled, downloadable datasets which are easy to access. But the majority of online data exists as web content such as blogs, news stories and cooking recipes. ... [Read more...]

Testing RSI(2) with R, First Steps

April 13, 2009 | Joshua Ulrich

This is the first of a series of posts that will demonstrate how to build, test, and implement a trading strategy using my favorite FOSS, R. I chose the RSI(2) strategy because it has gotten considerable attention on trading blogs over the past 6 mont...
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Labeled outliers in R boxplot

April 13, 2009 | [email protected]

Boxplots are a good way to get some insight in your data, and while R provides a fine ‘boxplot’ function, it doesn’t label the outliers in the graph. However, with a little code you can add labels yourself:The numbers plotted next to ... [Read more...]

GGobi and Choreography

April 12, 2009 | Hadley Wickham

You might be interested in this rather unusual use of GGobi - to explore and understand dance! Noel Cressie, Ola Ahlqvist, and Hyowon Ban from the Ohio State University have been involved in a collaborative project centred around a William Forsythe mo... [Read more...]

New Garmin Forerunner

April 10, 2009 | Thinking inside the box

Going for a run--or a race--almost always meant grabbing the GPS and often also meant setting a target pace and distance. For the last four and a half years, this was measured by a Garmin Forerunner 201. That's the large rectangular model in the original "brick" form factor. I've come to ... [Read more...]

Inference for R

April 8, 2009 | Gregor Gorjanc

I got a message from Inference for R team. Their work is interesting, especially if you are bound to MS Excel and Word environment! It would be great if they would also support OpenOffice. They "benefit" from open source R and it would be great if they... [Read more...]

Marriage and Happiness

April 7, 2009 | John Myles White

The Pew Research Center just published a piece reviewing their finding that people who are married report significantly greater levels of happiness than those who are unmarried. I always enjoy this result, particularly because of contemporary Western c... [Read more...]

Helpful statistical references

April 7, 2009 | bryan

In a previous article I provided a list of R programming resources. As a complement to that post, I've compiled a list of statistically oriented websites that colleagues and I have found useful below. For the most part, these sites focus on statistic... [Read more...]

PDQ 5.0 is on the Launch Pad

April 4, 2009 | Neil Gunther

PDQ (Pretty Damn Quick) major release 5.0 is on the launch pad at Cape SourceForge. Because of a potential collision with the North Korean ICBM/satellite launch, we won't be filling the main liquid-hydrogen tank until next week (we don't want PDQ blame...
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Modern Microprocessor MIPS

April 2, 2009 | Neil Gunther

The question of how modern microprocessors compare with mainframe processors of yore, arises from time to time. The vernacular rate metric that has persisted for a long time (long in the history of computers, that is) is MIPS. Whether you approve of M...
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Rcpp 0.6.5

April 1, 2009 | Thinking inside the box

A minor new maintenance release 0.6.5 of Rcpp just went off to CRAN and Debian. This version corrects a small oversight for the OS X build, and adds the LGPL as file COPYING to the sources. [Read more...]

SNA with R: Loading your network data

April 1, 2009 | Allan Engelhardt

We are interested in Social Network Analysis using the statistical analysis and computing platform R. As usual with R, the documentation is pretty bad, so this series collects our notes as we learn more about the available packages and how they work. We use here the statnet group of packages, ...
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