[This article was first published on Rmetrics blogs, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here) Want to share your [Read more...]

[This article was first published on Rmetrics blogs, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here) Want to share your [Read more...]

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Today I'm going to share with you further outcomes of my research in statistical arbitrage trading technique - pair-trading. In the first part of pair-trading with S&P500 Companies I used downloaded data from yahoo to identify co-integrated pairs. Next stage is to take closer look at results and identify ... [Read more...]

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I love the portability of a laptop. I have a 45 min train ride twice a day and I fly a little too, so having my work with me on my laptop is very important. But I hate doing long running analytics on my laptop when I’m in the office ... [Read more...]

R Reference Card for Data Mining is available for free download at http://www.rdatamining.com. The website also provides another free document: R and Data Mining — Examples and Case Studies. [Read more...]

If you didn’t read the post from yesterday, I urge you to do so, or you won’t get what I’m writing here. http://flyordie.sin.khk.be/2011/04/08/day-19-rgg-s-a-btch/ So, coming back from yesterday, I had a talk with my supervisor who to... [Read more...]

For those who have been struggling with the installation of GGobi and the rggobi package under Windows: a major update of GGobi 2.1.9 is that GTK+ has been bundled with GGobi, so the installation of GTK+ is no longer required (I recommend you to uninst... [Read more...]

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The latest local R user group to join the fold is in St Louis, Missouri. Created by Josh Ulrich, their first meeting is on Monday, April 11. Check the link below for full details and to RSVP. Saint Louis R User Group: Inaugural Meeting [Read more...]

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I’m currently working on a paper that uses Polish survey data (EVS 2008). I am specifically looking at regional variation in particular responses. Because there are only around 1800 observations in the survey, which are split across 66 subregions of … Continue reading → [Read more...]

Twitter is a favorite source of text data for analysis: it’s popular (there is a huge volume of variety on all topics) and easily accessible using Twitter’s free, open APIs which are easily consumable in JSON and ATOM formats. Some … Continue reading → [Read more...]

(People who aren't interested in automated Markov chain Monte Carlo sampling, or have no idea what it is, should probably stop reading now.)Got an e-mail from a student trying to get the WinBUGS examples in Chapter 7 of the book to work, on MacOS under... [Read more...]

A  listbox is (as far as i thought) supposed to select one or more items in the list and put them in a variable. Well, not for the rgg listbox. Whatever you select, you’ll get an error.                 &#1... [Read more...]

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Once in a while, you embark on what looks like a simple computational procedure only to encounter frustration very early on. “I can’t even read my file into R!” you cry. Step back, take a deep breath and take note of what the software is trying to tell you. ... [Read more...]

Following my earlier post on Buffon’s needle and Bertrand’s paradox, above are four outcomes corresponding to four different generations (among many) of the needle locations. The upper right-hand side makes a difference in the number of hits (out of 1000). The R code corresponding to this generation was made ... [Read more...]