R-bloggers

(This article was first published on Win-Vector Blog » R, and kindly contributed to R-bloggers) We share our opinion that = should be preferred to the more standard <- for assignment in R. This is from a draft of the appendix of our upcoming book. This has the risk of becoming an R version of Javascript’s semicolon controversy, but...

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I already introduced some stuff I did with the last.fm API. But did you ever wonder if your taste of music changes over the year? Sunny music in the sunny months and dark music in darker months? Well, I did. And I want to check it out with the RLastFM ...

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Numbers are useful (I think we can all agree on that..). If you own a smart phone, you can install this runmeter app. When you run, you can take the smartphone with you and activate this app to collect interesting … Continue reading →

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(This article was first published on There is grandeur in this view of life » R, and kindly contributed to R-bloggers) This week I held the second introductory seminar on R, and I think it went pretty well — though I guess you really should ask my colleagues if you want to know. The first seminar was a lecture,...

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(This article was first published on Econometrics by Simulation, and kindly contributed to R-bloggers) # Zombies vs Humans Agent Based Simulation (the r script file in case blogger mangled my code)# This simulation is a simple repeated matching simulation in which each agent is matched with a random different agent.# I believe this is an appropriate way of modelling a human...

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Karl Saliba writes with some queries about our football paper, which I have already discussed on the blog here. He says:Thanks to the code in the appendix I could easily replicate (by using WinBUGS) a similar analysis on any football league of my ...

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The most recent edition of the Revolution Newsletter is out. The news section is below, and you can read the full April edition (with highlights from this blog and community events) online. You can subscribe to the Revolution Newsletter to get it monthly via email. Now Available: Revolution R Enterprise 6.2. Released today, this update further enhances the performance,...

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First, I would like to welcome all of you reading this via R-Bloggers. I have been a user of this superb resource for years and I'm proud that I now have the opportunity to contribute!In The Financial Crisis on Tape Part I I demonst...

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It used to be that the one of the first decisions to make when learning to program was between compiled (e.g. C or FORTRAN) and interpreted (e.g. Python) languages. In my opinion these days one would have to be a … Continue reading →

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This is an overview of tools for speeding up your R code that I wrote for the Davis R Users’ Group.

First, Ask “Why?”

It’s customary to quote Donald Knuth at this point, but instead I’ll quote my twitter buddy Ted Hart to illustrate a point:

I’m just going to say it.I like for loops in #Rstats,...

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Google Summer of Code has now opened for student applications, and the R Project has once again been selected as a mentoring organization.  I’ve discussed before that a variety of mentors have proposed a number of projects for students to work on during this summer, but I wanted to emphasize some points about the schedule. The deadline for

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by Joseph Rickert Baseball fans have been serious about statistics since Carl Pearson was a young man (although I doubt that Carl followed the game). It is not clear, though, exactly when baseball statisticians moved from doing descriptive stats into predictive analytics. In his book Super Crunchers, Ian Ayers credits Bill James of Baseball Abstract fame for getting this...

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Context awareness seems to be everywhere, and everyone seems to be saying that context matters.  Gartner foresees "a game-changing opportunity" in what it calls context-aware computing.  The title of their report states it best, "Context Shap...

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Word cloud of DOMA hearing transcriptsI must admit, there is something appealing about the word cloud - that is, until you try to understand what it actually means...Word clouds are pervasive - even in the science world. I was somewhat spurred to write...

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In addition to its weekly mathematics puzzles, Le Monde is now publishing a series of vulgarisation books on mathematics, under the patronage of Cédric Villani. Jean-Michel Marin brought me two from the series, one on the golden number and one on Pythagoras’ theorem. (This is actually a translation of a series published by El Pais

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The deadline for my book on R is fast approaching, so naturally I’m in full procrastination mode.  So much so that I’ve spent this evening creating a brainfuck interpreter for R.  brainfuck is a very simple programming language: you get an array of 30000 bytes, an index, and just 8 eight commands.  You move the

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Amazon is currently making the first edition of Bayesian Computation with R (Use R) by Jim Albert available for free on Kindle. I own a copy of the book and there is a lot of good content and R examples on how one can do general Bayesian statistics.  The R scripts  from the book (2nd edition but

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Several R packages provide an interface to query map services (Google Maps, Stamen Maps or OpenStreetMap) to obtain raster images …

Continuar leyendo »

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We are pleased to announce that Revolution R Enterprise Release 6.2 is available to new subscribers today. This new software release from Revolution Analytics includes a number of key new features: Support for open source R 2.15.3, the latest stable release of R. Since Release 2.14.2, the R Project has added 89 new features, 11 performance enhancements and 139...

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I managed to catch David Spiegelhalter’s Tails You Win on BBC iplayer last week. I missed it the first time round, only for my parents on my last visit home to tell me about a Statistician jumping out of a … Continue reading →

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If you didn't manage to catch Coursera's Data Analysis course, don't despair. Instructor Jeff Leek has made the course videos available on YouTube, which you can review at your leisure to learn how to plan, carry out, and communicate analyses of real data sets with R. (The course assumes you already have familiarity with R, so if you're new...

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Concerto is a open source R Content Management System for developing online applications.  The primary purpose of Concerto is for the designing of online tests.  However, the hard working programmers at the University of Cambridge Psychometrics Centre have created a program that is flexible enough to address a wide range of applications such as the development of statistical learning...

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I’m a big fan of open-source software for research. For example, R-statistics, Qgis, and Grass GIS are awesome programs. R can do any statistical tests and numerical modeling you can imagine; if there’s not a built-in function you can write … Continue reading →

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Here are my slides from a short introductory seminar on R (essentially going through part I of the R tutorial) last week. As magic lantern pictures go, they’re hideously ugly, but they were mostly there for future reference. Most of the seminar was spent showing RStudio. This Friday, we’ll practice some uses of qplot and make

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Earlier this month we blogged about Harvard Professors Gary King and Stuart Shieber providing advice to graduate students about open access, dissertations, and journal publishing. We also mentioned some of the great initiatives that facilitate open access publishing in the statistics community, like the Journal of Statistical Software (JSS), The R Journal and arxiv.org. The ...

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Our 5th Cologne R user group meeting was the best attended meeting so far, with 20 members finding their way to the Institute of Sociology for two talks by Diego de Castillo on shiny and Stephan Holtmeier on cluster analysis, followed by beer and schnitzel at the Lux, a gastropub nearby.

Shiny

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Some users had trouble installing the WRS package from R-Forge. Here’s a method that should work automatically and fail-safe: ?View Code RSPLUS# first: install dependent packages install.packages(c("MASS", "akima", "robustbase"))   # second: install suggested packages install.packages(c("cobs", "robust", "mgcv", "scatterplot3d", "quantreg", "rrcov", "lars", "pwr", "trimcluster", "multicore", "mc2d", "psych", "Rfit"))   # third: install WRS install.packages("WRS", repos="http://R-Forge.R-project.org",

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PQD performs a mean value analysis of queueing network models: mean values in; mean values out. By mean, I mean statistical mean or average. Mean input values include such queueing metrics as service times and arrival rates. These could be sample means. Mean output values include such queueing metrics as waiting time and queue length. These are computed means...

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