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Encyclopaedia: Geospace

A contribution which I wrote for Antarctica and the Arctic Circle: A Geographic Encyclopedia of the Earth’s Polar Regions. As a side note, I am normally quite pedantic about “Earth” and “Sun” being capitalised but the editor of the Encyclopaedia evidently had different views on this point.

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Encyclopaedia: Scottish National Antarctic Expedition

A contribution which Claire and I wrote for Antarctica and the Arctic Circle: A Geographic Encyclopedia of the Earth’s Polar Regions

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Font Awesome in Presentations: Notes

I’ve used various icons from Font Awesome in my last few presentations and I’ve been very pleased with the results.

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Encyclopaedia: SANAE IV

A contribution which I wrote for Antarctica and the Arctic Circle: A Geographic Encyclopedia of the Earth’s Polar Regions.

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First Steps with Tableau: Decimal Separator

I downloaded a trial version of Tableau today and tried it out on one of the data sets I am currently working with. The data are stored in XLSX. Both the spreadsheet and my locale have a period set as the decimal separator, yet when I imported the data into Tableau it used a comma as the decimal separator.

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Dealing with a Byte Order Mark (BOM)

I have just been trying to import some data into R. The data were exported from a SQL Server client in tab-separated value (TSV) format. However, reading the data into R the “usual” way produced unexpected results:

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Visualising Nobel Prizes and Laureates

A very cool visualisation. Find out more at brainpickings.org.

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Book Review: Graph Databases

The book Graph Databases by Ian Robinson, Jim Webber and Emil Eifrem gives an engaging overview of Graph Databases, describing typical use cases and illustrating the syntax used to construct and query them.

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Book Review: R for Business Analytics

The book R for Business Analytics by Ajay Ohri sets out to look at “some of the most common tasks performed by business analysts and helps the user navigate the wealth of information in R and its 4000 packages.” In my opinion it succeeds in covering an extensive range of topics but fails to provide anything of substantial use to its intended audience. At least, not anything that could not be uncovered by a brief internet search.

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Download Option Chain From Google Finance In R An Update

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Random Number Generators

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Simulating Intricate Branching Patterns with DLA

Manfred Schroeder’s book Fractals, Chaos, Power Laws: Minutes from an Infinite Paradise is a fruitful source of interesting topics and projects. He gives a thorough description of Diffusion-Limited Aggregation (DLA) as a technique for simulating physical processes which produce intricate branching structures. Examples, as illustrated below, include Lichtenberg Figures, dielectric breakdown, electrodeposition and Hele-Shaw flow.

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Lessons I've Learned from Physics

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Rosetta's Rendezvous with Comet 67P

On 12 November 2014 the Philae lander from the Rosetta robotic space probe successfully landed on comet 67P/Churyumov–Gerasimenko. A couple of great comics to commemorate this momentous achievement.

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Zacks Data on Quandl

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Creating More Effective Graphs

A few years ago I ordered a copy of the 2005 edition of Creating More Effective Graphs by Naomi Robbins. Somewhat shamefully I admit that the book got buried beneath a deluge of papers and other books and never received the attention it was due. Having recently discovered the R Graph Catalog, which implements many of the plots from the book using ggplot2, I had to dig it out and give it some serious attention.

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Standard Bank: Striving for Mediocrity

Recently I was in my local Standard Bank branch. After finally reaching the front of the queue and being helped by a reasonably courteous young man, I was asked if I would mind filling out a survey. Sure. No problem. I had been in the bank for 30 minutes, I could probably afford another 30 seconds.

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Commitments of Traders: Update 19 August 2014

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Commitments of Traders: Update 12 August 2014

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Plotting Flows With Riverplot

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