December 2013

Twitter Battle

December 2, 2013 | Alvaro "Blag" Tejada Galindo

I love to have fun with R and Twitter...there are a lot of cool things that you can do with it...so I just thought of having a small Twitter Battle application...something that will grab the number of followers and lists from two users...apply some cra... [Read more...]

Newest release of BCEA

December 2, 2013 | Gianluca Baio

Very shortly, I'll upload the newest release of BCEA, my R package to post-process the output of a (Bayesian) health economic model and produce systematic summaries (such as graphs and tables) for a full economic evaluation and probabilistic sensitivit... [Read more...]

Basic overview of the rmongodb package for R

December 2, 2013 | btibert3

I have been playing around with MongoDB quite a bit over the last few months.  Because I am much better at coding in R, I decided to write up my notes on how to use the rmongodb package. This is not a comprehensive tutorial by any stretch, but I wanted ... [Read more...]

Probabilities and P-Values

December 2, 2013 | Wesley

P-values seem to be the bane of a statistician’s existence.  I’ve seen situations where entire narratives are written without p-values and only provide the effects. It can also be used as a data reduction tool but ultimately it reduces the world into a binary system: yes/no, accept/... [Read more...]

Open Science with R

December 2, 2013 | rOpenSci Blog - R

Upcoming Book on Open Science with R We're pleased to announce that the rOpenSci core team has just signed a contract with CRC Press/Taylor and Francis R series to publish a new book on practical ways to implement open science into your own research using R. Given all the ... [Read more...]

Highlighting text in text mining

December 2, 2013 | rOpenSci Blog - R

rplos is an R package to facilitate easy search and full-text retrieval from all Public Library of Science (PLOS) articles, and we have a little feature which aren't sure if is useful or not. I don't actually do any text-mining for my research, so perhaps text-mining folks can give some ... [Read more...]

Converting C code to C++ code: An example from plyr

December 2, 2013 | Rcpp Gallery

The plyr package uses a couple of small C functions to optimise a number of particularly bad bottlenecks. Recently, two functions were converted to C++. This was mostly stimulated by a segmentation fault caused by some large inputs to the split_indices() function: rather than figuring out exactly what was ...
[Read more...]

Evaluating Quandl Data Quality – part II

December 2, 2013 | The R Trader

This post is a more in depth analysis of Quandl futures data vs. Bloomberg data. Since my last post Quandl has updated its futures database to 200+ contracts from 68 contracts originally. For practical reasons, I limit myself here to the initial list of 60+ contracts. I’m still comparing the “Front Month” ... [Read more...]

24 Days of R: Day 1

December 1, 2013 | PirateGrunt

Last year, the good people at is.R() spent December publishing an R advent calendar. This meant that for 24 days, every day, there was an interesting post featuring analysis and some excellent visualizations in R. I think it's an interesting (if very challenging) exercise and I'm going to try to ... [Read more...]

Read line by line of a file in R

December 1, 2013 | Gregor Gorjanc

Are you using R for data manipulation for later use with other programs, i.e., a workflow something like this:read data sets from a disk,modify the data, andwrite it back to a disk.All fine, but of data set is really big, then you will soon stumble on ... [Read more...]

Tutorials from the IV Jornadas de usuarios de R.

December 1, 2013 | aleixrvr

The “IV Jornadas de usuarios de R”  were held in Barcelona on November 15th and 16th of 2012. From the Barcelona’s Users Group (RugBcn) we want to highlight two workshops given by some of the RugBcn’s organizers : Ggplot2 and ggmaps by Lluís Ramon, Andreu Valls and Roger Borrà... [Read more...]
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