by Joseph Rickert I was very happy to have been able to attend R / Finance 2014 which wrapped up a couple of weeks ago. In general, the talks were at a very high level of play, some dealing with brand new ideas and many presented at a significant level of technical ... [Read more...]

Early Bird Registration for the EARL Conference (Effective Applications of the R Language) closes tomorrow, Friday 30th May. The EARL conference will be held in London on [Read more...]

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Put away that novel! Here's some really fun June reading: Berger, J., 2003. Could Fisher, Jeffreys and Neyman have agreed on testing?. Statistical Science, 18, 1-32. Canal, L. and R. Micciolo, 2014. The chi-square controversy. What if Pearson had R? Journal of Statistical Computation and Simulation, 84, 1015-1021. Harvey, D. I., S. J. Leybourne, ... [Read more...]

A new version of caret is on CRAN now. There are a number of bug fixes: A man page with the list of models available via train was added back into the package. See ?models. Thoralf Mildenberger found and fixed a bug in the variable importance calcu... [Read more...]

Many companies are considering switching from SAS to R for statistical data analysis, and may be wondering how R compares in performance and data size scalability to the legacy SAS systems (base SAS and SAS/Stat) they are currently using. Performance and scalability for R is exactly what Revolution R ... [Read more...]

Over the years, there have been a couple of issues I have been trying to address in my daily use of this excellent package. Both are “cosmetic” improvements, they only improve the usability of the package. Let me share them and see whether they can be improved further.:) First, let’... [Read more...]

I've been asked a few times how to make a so-called volcano plot from gene expression results. A volcano plot typically plots some measure of effect on the x-axis (typically the fold change) and the statistical significance on the y-axis (typically the... [Read more...]

Motivation In R, we can pass further arguments to sapply. The arguments are then passed the function to be applied over. x [Read more...]

Yajuan Si, Natesh Pillai, and I write: It has historically been a challenge to perform Bayesian inference in a design-based survey context. The present paper develops a Bayesian model for sampling inference using inverse-probability weights. We use a hierarchical approach in which we model the distribution of the weights of ... [Read more...]

The NOAA Operational Model Archive and Distribution System is a treasure trove of near real time and archived model outputs describing global and regional weather, sea ice, and wave data.  I developed the rNOMADS package about a year ago to make this available to R users. In this post, I’... [Read more...]

This post talks about my workflow for getting started with a new data analysis project using the ProjectTemplate package. Overview of ProjectTemplate ProjectTemplate is an R Package which facilitates data analysis, encourages good data analysis habit... [Read more...]

Obviously, preference precedes choice because choices are made to maximize preference. That is certainly the way we conduct our marketing research. We generate factorial designs and write descriptions full of information about products and services. Ou... [Read more...]

In collaboration with useR!2014, upcoming 30 June – 3 July at UCLA, the Organisation for Economic Co-operation and Development (OECD has just announced the Programme [Read more...]

Familiar with R and DataVis? Take a try in PISA data visualisation contest for useR2014 participants. There are two contest tracks. In each you can win 700$. More information about the contest can be found here: http://www.oecd.org/pisa/pisaproducts/datavisualizationcontest.htm. The prizes are funded by The Organisation ... [Read more...]

I'm in the process of modernizing the implementation of sugar in Rcpp11. Previous work already improved performance of sugar by allowing sugar classes themselves to implement how to apply themselves into their target vector. For example the sugar cla... [Read more...]

I pushed some code this morning to allow us to use this alternative syntax to use Rcpp11. #include using namespace Rcpp11 ; Of course the usual code will continue to work, and might even be preferable if you write code that needs to... [Read more...]

If you are lost and feel alone, circumnavigate the globe (For You, Coldplay) You can not consider yourself a R-blogger until you do an analysis of Twitter using twitteR package. Everybody knows it. So here I go. Inspired by the fabulous work of Jonathan Harris I decided to compare human ... [Read more...]

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A couple months ago I wrote about switching my class from using SPSS to one that uses R with a gui frontend (original post). Since the semester has wrapped up, below are my thoughts on how the course went with respect to the students using R. Things ... [Read more...]