273 search results for "Animation"

Of Height and Speed in Tennis, or Fuzziness and Techiness in College

April 24, 2011
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Of Height and Speed in Tennis, or Fuzziness and Techiness in College

I thought of this after reading this post and perhaps also this one, one the Cheap Talk blog. Here's the puzzle: in general, being tall does not make you slow; but among professional tennis players, the tall athletes do tend to be relativel...

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Visualizing iPhone location tracking with R and Google Maps

April 22, 2011
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Visualizing iPhone location tracking with R and Google Maps

Visualize location logs created by the iPhone using R and Google Maps.

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Time horizon in forecasting, and rules of thumb

April 7, 2011
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Time horizon in forecasting, and rules of thumb

I recently received an email about forecasting and rules of thumb. "Dans la profession se transmet une règle empirique qui voudrait que l'on prenne un historique du double de l'horizon de prévision : 20 ans de données pour une prévision

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Alpha shapes with R and lattice

Alpha shapes with R and lattice

What are the alpha shapes?: “The concept of alpha shapes formalizes the intuitive notion of “shape” for spatial point set data, which occurs frequently in the computational sciences. An alpha shape is a concrete geometric object that is uniquely defined for a particular point set. Alpha shapes are generalizations of the convex hull. Given a

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No simulation is complete without a gif

March 24, 2011
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No simulation is complete without a gif

I promise this is my last post on the now week and a half old π pay! Building on the last post, I figured I could show how convergence actually works in the estimation algorithm. If you’ll recall, we plotted … Continue reading →

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Visualizing Growth of a Retail Chain

March 15, 2011
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Visualizing Growth of a Retail Chain

I am a regular reader of the FlowingData blog by Nathan Yau. It is an excellent reference for anyone interested in statistical visualization of data. One of his posts that caught my attention was a visualization of the growth of Walmart in the US. Given my research interests in retail, it was a fascinating insight

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In case you missed it: January Roundup

March 8, 2011
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Catching up on roundups today. February roundup will follow soon, but in the meantime enjoy this trip down memory lane - DS. In case you missed them, here are some articles from January of particular interest to R users. Revolution Analytics is now offering annual sponsorship grants for local R user groups worldwide. Issue 2 of the R Journal...

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Mapping London’s Population Change 1801-2030

February 16, 2011
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Mapping London’s Population Change 1801-2030

Buried in the London Datastore are the population estimates for each of the London Boroughs between 2001 – 2030. They predict a declining population for most boroughs with the exception of a few to the east. I was surprised by this general decline and also the numbers involved- I expected larger changes from one year to ...

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What is the optimal strategy to marry the best one ?

February 13, 2011
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What is the optimal strategy to marry the best one ?

Valentine's day is a nice opportunity to post on hot and sexy topics... Well, it's also an important day that I should not miss, probably as much as Saint Patrick's my wife's birthday. And as I mentioned last week (here), it is difficult to get the...

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Rhythms of Equality and Inequality

February 6, 2011
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Rhythms of Equality and Inequality

Today I unveil my very first statistical YouTube video! I will do anything to keep you statisfied, and if that means YouTube, then so be it. But first, some exposition: In Panama, 10 percent of the population owned 45 percent of the income in 2000, whereas the bottom 10 percent owned only 0.6 percent. How

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