Monthly Archives: November 2012

Data types part 2: Using classes to your advantage

November 8, 2012
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Data types part 2: Using classes to your advantage

Last week I talked about objects including scalars, vectors, matrices, dataframes, and lists.  This post will show you how to use the objects (and their corresponding classes) you create in R to your advantage.First off, it's important to remember...

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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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Some academic thoughts on the poll aggregators

November 8, 2012
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Some academic thoughts on the poll aggregators

The night of the presidential elections I wrote a post celebrating the victory of data over punditry. I was motivated by the personal attacks made against Nate Silver by pundits that do not understand Statistics. The post generated a little … Continue reading →

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PEBOS (Post Election Burn Out Syndrome)

November 8, 2012
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PEBOS (Post Election Burn Out Syndrome)

I guess that all those that tried to follow the presidential election as closely as possible are more than just a little bit exhausted mentally. I call this PEBOS - Post Election Burn Out Syndrome.Among us some concentrated on the horserace aspect of t...

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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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Automated OSD Lookup and Display via SoilWeb and AQP

November 8, 2012
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Automated OSD Lookup and Display via SoilWeb and AQP

UPDATED 2013-04-08 This functionality it now available in the soilDB and sharpshootR packages. All code on this page is now superseded by the fetchOSD() and SoilTaxonomyDendrogram()functions. UPDATED 2012-11-07 I have been thinking about a URL-ba...

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Possible error in Bayesian bootstrap

November 8, 2012
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Possible error in Bayesian bootstrap

After my last post on Bayesian bootstrap I got a question why the sample from Dirichlet distribution is taken as weights for calculating mean in the procedure and not as weights used for sampling from the original data set. Actually this mistake i...

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finding meaningful clusters in phylogenetic trees or other hierarchical clusterings

November 8, 2012
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finding meaningful clusters in phylogenetic trees or other hierarchical clusterings

Phylogenetic trees are a specialization of hierarchical clustering which elegantly capture relatedness between observations, grouping like with like. Yet hierarchical clusterings have one common complaint, as compared to density/distribution based clustering, the ability to classify the data into different types. … Continue reading →

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Five Thirty-Hate?

November 8, 2012
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Five Thirty-Hate?

The last few days have been trying, mostly because folks keep asking me the same questions: have you voted? Who do you think will win the election? Do you think Nate Silver (http://fivethirtyeight.blogs.nytimes.com/)  is right? How confident are you ...

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Introducing Shiny: Easy web applications in R

November 8, 2012
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Introducing Shiny: Easy web applications in R

Say hello to Shiny, a new R package that we’re releasing for public beta testing today. Shiny makes it super simple for R users to turn analyses into interactive web applications that anyone can use. These applications let you specify input parameters using friendly controls like sliders, drop-downs, and text fields; and they can easily

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