Monthly Archives: December 2012

Amazon associates links (warnin’)

December 4, 2012
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Amazon associates links (warnin’)

As in previous years, let me warn unwary readers that the links to Amazon.com and Amazon.fr found on this blog are actually susceptible to earn me a monetary gain if a purchase is made in the 24 hours following the entry on Amazon through this link, thanks to the “Amazon Services

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Big Data Trees with Hadoop HDFS

December 4, 2012
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Last month's release of Revolution R Enterprise 6.1 added the capability to fit decision and regresson trees on large data sets (using a new parallel external memory algorithm included in the RevoScaleR package). It also introduced the possibility of applying this and the other big-data statistical methods of RevoScaleR to data files distributed in in Hadoop's HDFS file system*,...

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Finding a pin in a haystack – PCA image filtering

December 4, 2012
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Finding a pin in a haystack – PCA image filtering

I found the following post regarding the anomalous metal object observed in a Curiosity Rover photo to be fascinating - specifically, the clever ways that some programmers used for filtering the image for the object. The following answer on mathematica.stackexchange.com was especially illuminating for its use of a multivariate distribution to...

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My Job Just Got Shiny-er

December 4, 2012
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My Job Just Got Shiny-er

Today I went to the RStudio site to post a feature request.  I noticed up in the top navigation a link called "Shiny".  I like things that are shiny.  It turns out Shiny is a new package the RStudio team has developed for easily making r...

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Climate: Misspecified

December 4, 2012
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Climate: Misspecified

I'm usually quite a big fan of the content syndicated on R-Bloggers (as this post is), but I came across a post yesterday that was as statistically misguided as it was provocative. In this post, entitled "The Surprisingly Weak Case for Global Warming," the author (Matt Asher) claims that the trend toward hotter average global temperatures over the last

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An update on Shiny

December 4, 2012
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An update on Shiny

Last month we released Shiny, our new R package for creating interactive web applications. The response from the community has been extremely encouraging–we’ve received a lot of great feedback that has helped us to make significant improvements to the framework already! Shiny 0.2.3 on CRAN Starting with Shiny 0.2.3, you can install the latest stable

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R FAQs for the fresh starters

December 4, 2012
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R, which was largely predominant in the academic world, has started picking up a lot in businesses as well. At least that is what I am witnessing among my colleagues. Lot of people have started experimenting with R, choosing the path to enlightenment. ...

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Loading huge graphs with igraph and R

December 4, 2012
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igraph is a library for "complex network research". While it integrates very well with R and provides a lot of convenient functions, huge graphs put a quick end to all the joy. The good news is: not all functions in igraph have bad performanc...

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An epithet I can live with

December 4, 2012
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Here. Indeed, I’d much rather be a legend than a myth. I just want to clarify one thing. Walter Hickey writes: collaborated on this presentation where they take a hard look at what’s wrong with the recent trends of data visualization and infographics. The takeaway is that while there have The post An...

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More Shiny Goodness – Tinkering With the Ergast Motor Racing Data API

December 4, 2012
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More Shiny Goodness – Tinkering With the Ergast Motor Racing Data API

I had a bit of a play with Shiny over the weekend, using the Ergast Motor Racing Data API and the magical Shiny library for R, that makes building interactive, browser based applications around R a breeze. As this is just a quick heads-up/review post, I’ll largely limit myself to a few screenshots. When I

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