I’ve been using R on a daily basis for more than seven years, and I’ve been developing R packages over the last three years. I consider myself an experienced useR and most of my coworkers consider me an R master. However, there are still a lot of things ... [Read more...]

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some hacker news criticism convinced me to take a stab at the question: "what is R?" answer: the lingua statistica, s'il vous plaît. met my hero and the inspiration behind this website. bonus video: how to make coffee with r in two minutes. [Read more...]

You’ve already seen everyone else’s electoral map (see this amazing array of maps from 2008), how would you like to make your own? Today’s Gist allows you to do just that — input (manually!) state-by-state results, and output a... [Read more...]

Just had my supper. Stomach is full of stewed beef and potato.  I’d like to solve the 22nd Euler problem before tonight work (right, I’ll work late in my office). Using names.txt (right click and ‘Save Link/Target As…’), a 46K text file containing over … Continue reading → [Read more...]

I should start this with a disclaimer, ie that I'm not really claiming any "success" with this post. But I find it quite interesting that the estimations I produced with this very, very simple model turned out to be quite good.The idea was to use the e... [Read more...]

My favorite statistician did it again! Just like in 2008, he predicted the presidential election results almost perfectly. For those that don’t know, Nate Silver is the statistician that runs the fivethirtyeight blog. He combines data from hundreds of polls, uses … Continue reading → [Read more...]

In this post we'll fit some predicitve models in (well know) data bases, and evalute the performance of each model. Disclaimer1: for simplicity the predictive variables are treating without apply any transformation to get a better performance or stabil... [Read more...]

This entry is part 6 of 11 in the series Using ROne of the reasons that R has so much functionality is that people have incorporated a lot of academic code written in C, C++, Fortran and Java into various …   read more ... [Read more...]

I just sat in on the rehearsal for Thursday's webinar by John Deere's Derek Hoffman, Order Fulfillment Forecasting at John Deere: How R Facilitates Creativity and Flexibility. Derek will give a spirited argument of why R is critical for the faming equipment manufacturer's operations: from forecasting demand for equipment, forecasting ... [Read more...]

New hook functions, makeContext() and makeContent(), have been added to the grid graphics package. These functions allow an alternative approach to developing custom grobs when a grob can only decide what to draw at drawing time rather than when the … Continue reading → [Read more...]

Recently we at rOpenSci released our rfigshare package up on cran (or you can check out the most up to date version on github. So what’s so great about being able to create figshare articles through R? For some time now I’ve been advocating the use of a ... [Read more...]

Short update to Speed up R by using a different BLAS implementation/: MKL is overall the fastest OpenBLAS is faster than its parent GotoBLAS and comes close to MKL A = matrix(rnorm(n*n),n,n) A %*% A solve(A) svd(A) [Read more...]

I think it’s rather marvellous that a few expert coders are working on dispelling the cloud of mystery around the proprietary file format used by SAS software. Essentially, saving your data in a SAS format (with a name like mydata.sas7bdat) … Continue reading → [Read more...]

There are a few minor tweaks renaming on this map before it is complete, but I wanted to share the EPS Market Map I put together.  It can be downloaded using this link. This file is meant to be used with R and divides the lower 48 states into the CollegeBoard’... [Read more...]

The grey background and/or default choice of colours for groups makes a ggplot graph stand out to any R user when seen in a presentation. But ggplot graphs get all ninja when it comes to publications, either that or not … Continue reading → [Read more...]

A friend asked me to help with a forest plot recently. After chatting about what she wanted the end result to look like, this is what I came up with. grid.arrange(data_table, p, ncol=2) ## Warning: Removed 1 rows containing missing … Continue reading → [Read more...]

the national survey on drug use and health (nsduh) monitors illicit drug, alcohol, and tobacco use with more detail than any other survey out there.  if you wanna know the average age at first chewing tobacco dip, the prevalence of needle-sharing,... [Read more...]

I recently came across the Optimal Rebalancing Strategy Using Dynamic Programming for Institutional Portfolios by W. Sun, A. Fan, L. Chen, T. Schouwenaars, M. Albota paper that examines the cost of different rebablancing methods. For example, one might use calendar rebalancing: i.e. rebalance every month / quarter / year. Or one ... [Read more...]