January 2013

Code Pollution With Command Prompts

January 26, 2013 | Yihui Xie

This is not the first time I have ranted about command prompts, but I cannot help ranting about them whenever I saw them in source code. In short, a piece of source code with command prompts is like a bag of cooked shrimps in the market -- it does not ... [Read more...]

Waiting for an API request to complete

January 26, 2013 | Recology - R

Dealing with API tokens in R In my previous post I showed an example of calling the Phylotastic taxonomic name resolution API Taxosaurus here. When you query their API they give you a token which you use later to retrieve the result (see examples on their page above). However, you ... [Read more...]

R and foreign characters

January 25, 2013 | Rolf Fredheim

Working with Russian characters can be mind-numbingly frustrating. This is true for R, as for other applications, so below I've written out the my top five tricks for making Russian inputs work in R; i believe they should be transferable to most other languages. Having forced any number of programs ... [Read more...]

Video: Using R with Hadoop

January 25, 2013 | David Smith

If you weren't one of the almost 2000 people who signed up for yesterday's webinar "Using R with Hadoop", the replay and slides are now available. During the webinar, Jeffrey Breen (Principal at Think Big Academy) talked about extracting analytics from data in Hadoop and covered: How to use R and ... [Read more...]

Regressions 101: “Significance”

January 25, 2013 | Isomorphismes

SETUP (CAN BE SKIPPED) We start with data (how was it collected?) and the hope that we can compare them. We also start with a question which is of the form: how much tax increase is associated with how much tax avoidance/tax evasion/country fleeing by the top 1%? how ... [Read more...]

Object Orientation in R – Notes from a novice

January 25, 2013 | PirateGrunt

Having posted some code to Git a few days ago and having been wholly dissatisfied with it, I began to do what I often do with code I don’t like. I started re-writing it bigger and weirder and more philosophically pure. Part of this search for Platonic code lead ... [Read more...]

Time series cross-validation 5

January 24, 2013 | Zachary Mayer

The caret package for R now supports time series cross-validation!  (Look for version 5.15-052 in the news file).  You can use the createTimeSlices function to do time-series cross-validation with a fixed window, as well as a growin...
[Read more...]

local package delays

January 24, 2013 | xi'an

When Jean-Michel and I left Berlin, a month ago, I really thought we were that close to sending the new edition of Bayesian Core. Alas, we are not done yet for a series of reasons: leaving for India did not give me enough time to complete the help manual, some ... [Read more...]

R PMML Support: Data Transformations

January 24, 2013 | Alex Guazzelli

R and PMML Export   R is becoming the tool of choice for many data scientists. It is no wonder that many commercial and open-source statistical tools are also embracing R.Predictive ModelsA set of robust predictive analytic techniques is... [Read more...]

Storing a Function in a Separate File in R

January 24, 2013 | Mollie

If you're going to be using a function across several different R files, you might want to store the function in its own file.If you want to name the function in its own fileThis is probably the best option in general, if only because you may want to p... [Read more...]

Votamatic predicted the election with R

January 24, 2013 | David Smith

While Nate Silver got a lot of the attention for correctly forecasting the US presidential election, other forecasters were just as succesful. Drew Linzer used the R language to build the statistical model behind votamatic.org, and was able to predict the outcome of the election months before most pundits. ... [Read more...]

No more ascii-art

January 24, 2013 | Will

At least fourfive R packages will turn your regression models into pretty latex tables: texreg, xtable, apsrtable, memisc, and stargazer.  This is very nice if you happen to be a latex document or its final reader, but it’s not so great if you’re making those models to start ... [Read more...]
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