Monthly Archives: April 2012

Big Data, R and HANA: Analyze 200 Million Data Points and Later Visualize Using Google Maps

April 11, 2012
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Big Data, R and HANA: Analyze 200 Million Data Points and Later Visualize Using Google Maps

Technologies: SAP HANA, R, HTML5, D3, Google Maps, JQuery and JSONFor this fun exercise, I analyzed more than 200 million data points using SAP HANA and R and then brought in the aggregated results in HTML5 using D3, JSON and Google Maps APIs.  Th...

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Latex Allergy Cured by knitr

April 11, 2012
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Latex Allergy Cured by knitr

I have always known that at some point I would have to succumb to the power of Latex, but Latex has been uncharacteristically intimidating to me.  I finally found the remedy to my Latex allergy with the amazing and fantastic knitr package from Yih...

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Stop squinting at word clouds in the hope of getting insights

April 11, 2012
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Stop squinting at word clouds in the hope of getting insights

Someone recently asked on twitter about about peoples' preferences for cloud generators in R. I replied that I thought the "null" word cloud generator was best. By this I mean that I think the word cloud is a bad visualization method. Why? Here is one article with a good perspective, but you can search for

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Flying: Boredom and Terror

April 11, 2012
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Flying: Boredom and Terror

Data represents all planes (not just commercial planes) for the United States "There are only two emotions on a plane: boredom and terror." -- Orson Welles, interview to celebrate his 70th birthday, The Times of London, 6 May 1985. ...

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The age of sail, visualized

April 11, 2012
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As anyone who's ever played Civilization knows, the advent of sailboats capable of crossing the oceans leads to an explosion of exploration, commerce and social development. And with the visualization below, you can see that explosion in action: Ben Schmidt used the R language and data recorded in by hand in ship logs to create the animation above. Like...

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Does mindfulness aid insight problem solving? New study suggest so

April 11, 2012
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Does mindfulness aid insight problem solving? New study suggest so

A new study (Ostafin, B. D., & Kassman, K. T, In Press) examined whether mindfulness meditation could help improve participants' insight problem solving skills. Their hypothesis was that mindfulness might aid in solving of problems that require creative, nonhabitual responses. Insight problems These are problems that typically...

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PostgreSQL Scalability Analysis Deconstructed

April 11, 2012
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PostgreSQL Scalability Analysis Deconstructed

In 2010, I presented my universal scalability law (USL) at the SURGE conference. I came away with the impression that nobody really understood what I was talking about (quantifying scalability) or, maybe DevOps types thought it was all too hard (math). Since then, however, I've come to find out that people like Baron Schwartz did get it...

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The Euler Method In R

April 11, 2012
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The Euler Method is a very simple method used for numerical solution of initial-value problems. Although there are much better methods in practise, it is a nice intuitive mechanism. The objective is to find a solution to the equation $$ … Continue reading →

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Customising vegan’s ordination plots

April 11, 2012
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Customising vegan’s ordination plots

As a developer on the vegan package for R, one of the most FAQs is how to customise ordination diagrams, usually to colour the sample points according to an external grouping variable. Now, just because we get asked how to … Continue reading →

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RcppArmadillo 0.3.0 is now on CRAN

April 11, 2012
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Conrad Sanderson has released a new major version 3.0.0 of his excellent Armadillo C++ template library for linear algebra. A corresponding new release 0.3.0 of RcppArmadillo is now on CRAN. This follows four pre-releases of Armadillo which we pack...

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