I enjoyed this article by Keith Bradnam, and the associated tweets, on the problem of duplicated names for bioinformatics software. I figured that to some degree at least, we should be able to search for such instances, since the titles of published articles that describe software often follow a particular ... [Read more...]

I use Makefiles to make reproducibility easier. They can become rather complex. I lately had the idea that it would be nice to be able to visualize my Makefiles. Turns out that you need just a few lines in R to get a decent graph. I figured this would ... [Read more...]

IMPORTANT NOTE Code from this post is outdated (package APIs were changed). See this post. Today I am pleased to present tmlite - small, but fast and robust package for text-mining tasks in R. It is not availible yet on CRAN, but you can install it directly from github:

devtools<span>::</span>install_github<span>(</span><span>"dselivanov/tmlite"</span><span>)</span>

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I came across the claim in the US press suggesting that the taller the candidate, the better his/her chances for success in presidential elections. After a little search, I found this Wikipedia entry, and even some academic research on the issue, mainly relating this phenomenon to some sort of ... [Read more...]

Now that we fitted the classifier and run some preliminary tests, in order to get a grasp at how our model is doing when predicting creditability we need to run some cross validation methods.Cross validation is a model evaluation method that does not u... [Read more...]

Remember curve stitching from grade school? It makes for a nice tutorial for working with some common R functionality.Here's an example of how to create the appearance of a parabola from plotting a series of straight lines:pkg [Read more...]

I am working on a project that introduces data-driven reasoning (and of course R) to secondary schools conveyed by the fictional adventures of two teenagers, Beta and Bit. Beta is a level-headed girl who has a passion for maths, logic and the art of deduction. Bit is a hot-headed hacker ... [Read more...]

Microsoft have announced new funding for R User Groups (Python and Hadoop too), so now seems as good a time as any for me to stop procrastinating and set up a Qatar R User Group. If you live anywhere near Doha, and are interested in coming along to a (probably ... [Read more...]

The 15th Cologne R user group meeting is scheduled for this Friday, 18 September 2015 and we have a full agenda with three talks followed by networking drinks. R in big data pipeline with luigi (Yuki Katoh) R in big data pipeline: Put your awesome R co... [Read more...]

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Dear R programmers,In this May (2015), our favorite "R" almost came to 12th position in the popular TIOBE Programming Community Index (TIOBE Index), however, it is experienced some volatility after that and couldn't move further to top 10. Currently, it holds 19th rank (for this month); wishing it retains its position ... [Read more...]

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This is a small package I put together quickly to satisfy an immediate need: generating abbreviated URLs in R. As it happens I require this functionality in a couple of projects, so it made sense to have a package to handle the details. It's not perfect but it does the ... [Read more...]

In case you missed them, here are some articles from August of particular interest to R users. Creating interactive time series charts of financial data in R. Many R books have been translated into Chinese. A tutorial on visualizing current-events geographic data with choropleths. Revolution R Enterprise 7.4.1 is now available ... [Read more...]

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(The image above has nothing do to with this post. It does, however, show the prize that my daughter won during a recent vacation to Virginia and how I got it back home). I was recently asked to explain a potential disconnect in C5.0 between the class probabilities shown in ... [Read more...]

This is a functionality I wanted to add for some time… and finally it’s here! I just pushed on GitHub a new version of rleafmap which brings the possibility to attach legends to data layers. You simply need to create … Lire la suite → [Read more...]