Monthly Archives: June 2014

Twins, Tripods and Phantoms at the Comrades Marathon

June 12, 2014
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Twins, Tripods and Phantoms at the Comrades Marathon

Having picked up a viral infection days before this year’s Comrades Marathon, on 1 June I was left with time on my hands and somewhat desperate for any distraction. So I spent some time looking at my archive of Comrades data and considering some new questions. For example, what are the chances of two runners

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Basketball Data Part III – BMI: Does it Matter?

June 11, 2014
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Basketball Data Part III – BMI: Does it Matter?

For those of you who are just joining us, please refer back to the previous two posts referencing scraping XML data and length of NBA career by position. The next idea I wanted to explore was whether BMI had any … Continue reading →

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More companies using R: Uber and CultureAmp

June 11, 2014
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More companies using R: Uber and CultureAmp

To follow on from this post, here are a couple more companies using R: Uber, the ride-share company, uses R for statistical analysis. According to econometric analysis of DUI incidents (driving under the influence of alcohol or drugs) in Seattle, the introduction of the Uber service corresponded with a 10% decrease in DUIs (about 5 a week). The analysis...

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Bar charts with percentage labels but counts on the y axis

June 11, 2014
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Bar charts with percentage labels but counts on the y axis

Bar charts and histograms are easily to understand. I often write for non-specialist audiences so I tend to use them a lot. People like percentages too, so a bar chart with counts on the y axis but percentage labels is a useful thing to be able to produce. But how to do them in our

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The Most Comprehensive Review of Comic Books Teaching Statistics

June 11, 2014
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The Most Comprehensive Review of Comic Books Teaching Statistics

As I’m more or less an autodidact when it comes to statistics, I have a weak spot for books that try to introduce statistics in an accessible and pedagogical way. I have therefore collected what I believe are all books that introduces statistics using comics (at least those written in English). What follows are highly subjective reviews of those...

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Trend Vigor Part III: ATR position sizing, Annualized Sharpe above 1.4, and Why Leverage Is Pointless

June 11, 2014
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Trend Vigor Part III: ATR position sizing, Annualized Sharpe above 1.4, and Why Leverage Is Pointless

To continue the investigation of Trend Vigor (see part 1 here, and part 2 here), let’s examine the importance of … Continue reading →

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Visualizing Bus Stops with rCharts

June 11, 2014
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I wanted to create a quick visualization of Bloomington IL bus stops. This data is in pdf file format spread across multiple files. The first step, before any mapping can occur, is downloading those files, parsing them to get the bus stop locations and...

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Extract Coordinates and Other Data from KML in R

June 11, 2014
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KML files are used to visualize geographical data in Google Earth. These files are written in XML and allow to visualize places and to attach additional data in HTML format.In these days I am working with the MIDAS database of wind measuring stations a...

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A two-hour online course on ggplot2 and Shiny

June 11, 2014
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A two-hour online course on ggplot2 and Shiny

I’ve just published a video course with Packt Publishing about ggplot2 and Shiny! In just two hours, you’ll get to learn the popular R packages ggplot2 and Shiny, as well as how to put them together to build interactive webpages. … Continue reading →

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Statistical modeling and computation [apologies]

June 11, 2014
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Statistical modeling and computation [apologies]

In my book review of the recent book by Dirk Kroese and Joshua Chan,  Statistical Modeling and Computation, I mistakenly and persistently typed the name of the second author as Joshua Chen. This typo alas made it to the printed and on-line versions of the subsequent CHANCE 27(2) column. I am thus very much sorry

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