As part of a bigger project, I needed to simulate a text string based on a source document, but at the character level. Just in case people find the code useful, I’ve uploaded it to MCMCtext.r. In my simulated text, each character is chosen based on the transition ... [Read more...]

R and Data Mining: Examples and Case Studies Author: Yanchang Zhao Publisher: Academic Press, Elsevier Publish date: December 2012 ISBN: 978-0-12-396963-7 Length: 256 pages URL: http://www.rdatamining.com/books/rdm This book introduces into using R for data mining with examples and case studies. … Continue reading → [Read more...]

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You received confirmation this morning.  Someone made a mistake programming that battery of satisfaction ratings on your online survey.  Instead of each respondent rating all 12 items using a random rotation, only six randomly selected i... [Read more...]

This stems from a couple of binomial distribution projects I have been working on recently.  It’s widely known that there are many different flavors of confidence intervals for the binomial distribution.  The reason for this is that there is a coverage problem with these intervals (see Coverage Probability).  A 95% ... [Read more...]

Data Scientist John Myles White used R to compare life expectancy and retirement age in the USA. While male (red) and female (green) life expectancies are rising, average retirement age is going down. What this means for the future of benefit programs like Social Security is the topic of an ... [Read more...]

In today's social world, it's important to be able to collaborate with others online when working with data, and to be able to easily share your outputs online. Fortunately, the R language and the broad R community provides a number of facilities for collaboration and sharing, which are summarized in ... [Read more...]

This is the third post about Christofides' paper on Regression models based on log-incremental payments [1]. The first post covered the fundamentals of Christofides' reserving model in sections A - F, the second focused on a more realistic example and model reduction of sections G - K. Today's post will wrap ... [Read more...]

The dataset used in Bayesian Core for the chapter on image processing is a Landsat picture of Lake of Menteith in Scotland (close to Loch Lomond). (Yes, Lake of Menteith, not Loch Menteith!) Here is the image produced in the book. I just got an email from Matt Moores at ... [Read more...]

For a class I'm taking this semester on genomics we're dealing with some pretty large data and for this reason we're learning to use mySQL. I decided to be a geek and do the assignments in R as well to demonstrate the ability of R to handle pretty larg... [Read more...]

As long as I can't find the time to post my newest adventuRes, why don't you check out the great collection of other R-blogs on the web:www.r-bloggers.com Have fun! [Read more...]

R Evangelist Bryan Lewis on a natural integration of the R analytic environment and SciDB's distributed, multidimensional array database. [Read more...]

There are several ways to perform data transformations in R. Each has its own set of advantages and disadvantages. Let’s take one variable, square it and add 100. How many ways might an R beginner screw up such a simple … Continue reading → [Read more...]

I use R a lot in my day to day workflow, particularly for manipulating raw data files into a format that can be used for analysis. This is often a brain-taxing exercise and, sometimes, it would be totally quicker to … Continue reading → [Read more...]

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At long last (1.5yrs since the first submission attempt to be exact), the research I worked on as a post-doctoral fellow has been published!Click on the image above to head over to the article for some light reading.  A lot of work went into this ... [Read more...]

I’m constantly amazed at what can be done using free software, such as R, and more importantly, what can be done with data that are available on the internet. In an earlier post, I confessed to my sedentary lifestyle immersed in code, so my opinion regarding the utility of ... [Read more...]

In the sponsored article Data Science: Buyer Beware at Forbes, SAP's Ray Rivera takes a dim view of Data Science. According to Rivera, Data Science is a "management fad" in the mold of Business Process Reengineering, and casts data scentists as self-ordained "gurus" whose mission is to stand between the "... [Read more...]

This Thursday (Jan 24th), 5:30pm, the good folks at Wajam are hosting a meetup of the Montreal R User Group. The event will be at Bolidea at 4115 St Laurent, Montréal, QC. Be sure to RSVP. From Benjamin Rollert: This is an opportunity for people interested in R to hang ... [Read more...]

digest version 0.6.1 is now on CRAN, and I will push the corresponding version into Debian shortly. Duncan Murdoch added AES support, and helped me fix two issues which (annoyingly) made the Rout.save output differ on another platform. CRANberries... [Read more...]