1231 search results for "tutorial"

Chocolate and nobel prize – a true story?

December 22, 2012
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Chocolate and nobel prize – a true story?

Few of us can resist chocolate, but the real question is: should we even try to resist it? The image is CC by Tasumi1968. As a dark chocolate addict I was relieved to see Messerli's ecological study on chocolate consumption and the...

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Learn to use R for FREE with Coursera

December 21, 2012
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Learn to use R for FREE with Coursera

Coursera is offering free courses about R among other interesting subjects. The first one on the application of R in financial econometrics is happening this week (but you can still enroll). There are two more courses starting in January 2013 are more about using R to analyse the data. The differences between the two are

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A simple web application using Rook

December 21, 2012
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A simple web application using Rook

by Ben Ogorek I'm grateful to Rook for helping me, a simple statistician, learn a few fundamentals of web technology. For R web application development, there are increasingly polished methods available (most notably Shiny ), but you can build one...

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R Journal Volume 4, Issue 2

December 20, 2012
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The latest issue of the bi-annual, peer-reviewed journal about R, the R Journal, is now available for download. This issue includes three articles on graphics from R-core member and R Graphics author Paul Murrell. He writes about accessing individual elements of an R chart by the component names, drawing complex symbols with the polypath function (useful for map icons,...

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How to select and merge R data frames with SQL

December 17, 2012
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The R language provides many features in the language for selecting data from data frames: the "[" operator, logical functions, and utility functions like "subset". But if you know SQL (the query language ubiquitous in database systems), none of this is necessary. With the sqldf package, you can just pretend that your data frame is a database, and use...

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Video: SQL queries in R using sqldf package

December 17, 2012
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This video covers how to run SQL queries using the ‘sqldf’ package within R. This sqldf tutorial was part of a Keystone Solutions podcast discussion about data science and what skills beginning analysts should be learning to improve their skill set. The example files from this tutorial can be downloaded from this link: Example Data Video: SQL...

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analyze the behavioral risk factor surveillance system (brfss) with r and monetdb

December 17, 2012
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experimental.  the behavioral risk factor surveillance system (brfss) aggregates behavioral health data from 400,000 adults via telephone every year.  it's um *clears throat* the largest telephone survey in the world and it's gotta lotta uses...

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Political revolutions on Twitter, visualized with R

December 13, 2012
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Twitter has become a powerful medium for organizing and communicating with factions during popular uprisings: the crisis in Egypt, the uprising in Syria, the revolution in Iran, and other conflicts all around the world. Twitter's effectiveness relies on its ability for the various factions to self-organize and to fight the information battle in social media. Esteban Moro Egido, a...

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In case you missed it: November 2012 Roundup

December 12, 2012
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In case you missed them, here are some articles from November of particular interest to R users. In the webinar "Real-Time Predictive Analytics with Big Data", I showed how R fits into a real-time production system. R package developer Yihui Xie shares his favorite software and hardware in an interview with The Setup. Hadley Wickham created a handy tutorial...

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Four years of the Revolutions Blog

December 10, 2012
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Yesterday was the fourth anniversary of the Revolutions blog. Our first post was way back on December 9, 2008, and in the four years since we've been regularly posting about R, open source, statistics, big data, data science and other random things that happened to catch our eye. In fact, there have been 1488 posts published in the last...

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