Posts Tagged ‘ R ’

RStudio releases Shiny

November 12, 2012
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RStudio has released a new package for R. Shiny allows R developers to build simple interactive Web-based interfaces for R scripts, using only R code (no JavaScript development required!). You can see some examples of Shiny in action in this blog post, and there are more details about Shiny's capabilities in this tutorial. Shiny was first announced to beta...

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Some Thoughts on Teaching R to 50,000 Students

November 12, 2012
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Two weeks ago I finished teaching my course Computing for Data Analysis through Coursera. Since then I’ve had some time to think about how it went, what I learned, and what I’d do differently. First off, let me say that it was a lot of fun....

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Video: How John Deere uses R

November 9, 2012
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Farming equipment manufacturer John Deere uses R, and in yesterday's webinar their manager of forecast analytics, Derek Hoffman, explained what they use it for: In the presentation, Derek gave a spirited argument of why R is critical for John Deere's operations: from forecasting demand for equipment, to forecasting crop yields (they produce forecasts for more than half the world's...

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Video: Overlay Histogram in R (normal, density, another series)

November 9, 2012
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This video explains how to overlay histogram plots in R for 3 common cases: overlaying a histogram with a normal curve, overlaying a histogram with a density curve, and overlaying a histogram with a second data series plotted on a … Continue reading →Video: Overlay Histogram in R (normal, density, another series) is an article from

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Unbelievable and Amazing R Shiny–Web Parameter Test in 1.5 Hours

November 9, 2012
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Unbelievable and Amazing R Shiny–Web Parameter Test in 1.5 Hours

Life keeps getting better and better.  Yesterday, I discovered the absolutely unbelievable and amazing work RStudio has done with Shiny employing one of my favorite R packages websockets.  As proof of the ease and quality, within a couple of ...

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R midterms

November 9, 2012
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R midterms

Here are my R midterm exams, version A and version B in English (as students are sitting next to one another in the computer rooms), on simulation methods for my undergrad exploratory statistics course. Nothing particularly exciting or innovative! Dedicated ‘Og‘s readers may spot a few Le Monde puzzles in the lot… Two rather entertaining

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Project Euler — problem 23

November 9, 2012
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Officially, it’s weekend. I’m solving this 23rd Euler problem just before my supper. A perfect number is a number for which the sum of its proper divisors is exactly equal to the number. For example, the sum of the proper divisors … Continue reading →

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R Code for A Justification and Application of Eigenvector Centrality

November 8, 2012
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R Code for A Justification and Application of Eigenvector Centrality

Leo Spizzirri  does an excellent job of providing mathematical intuition behind eigenvector centrality. As I was reading through it, I found it easier to just work through the matrix operations he proposes using R.  You can find his paper her...

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What’s new in Revolution R Enterprise 6.1

November 8, 2012
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We're pleased to announce that the latest update to Revolution R Enterprise is available today! Existing subscribers will soon receive an email with update instructions, and the free academic distribution will be updated later today. Version 6.1 adds a frequently-requested big-data statistical modeling algorithm, adds new connectivity option for Hadoop, improves performance, and provides new security and installation options...

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Revisiting the GOP Race with the Huff Post API and pollstR

November 7, 2012
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Revisiting the GOP Race with the Huff Post API and pollstR

Well, one election is over but it is never too soon to start another – or in this case revisit the past four years One day after the 2008 US Presidential election, there was a Rasmussen poll taken of 1000 likely voters asking for their choice for the 2012 Republican Presedential Candidate. The overwhelming favourite

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