August 2018

Learning Analytic Administration through a Sandbox

August 22, 2018 | R Views

It all starts with sandboxes. Development sandboxes are dedicated safe spaces for experimentation and creativity. A sandbox is a place where you can go to test and break things, without the ramifications of breaking the real, important things. If you’re an analytic administrator who doesn’t have access or ...
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Using gganimate to illustrate the luminance illusion

August 22, 2018 | David Smith

Many illusions are based on the fact that our perceptions of color or brightness of an object are highly dependent on the background surrounding the object. For example, in this image (an example of the Cornsweet illusion) the upper and lower blocks are exactly the same color, according to the ... [Read more...]

Read the docs before questioning R’s defaults

August 22, 2018 | Iñaki Úcar

The latest R tip in Win-Vector Blog encourages you to Use Radix Sort based on a simple benchmark showing a x35 speedup compared to the default method, but with no further explanation. In my opinion, though, the complete tip would be, instead, use radix sort… if you know what you ... [Read more...]

the pie chart

August 22, 2018 | R on Dominic Royé

Welcome to my blog! I am Dominic Royé, researcher and lecturer of physical geography at the University of Santiago de Compostela. One of my passions is R programming to visualize and analyze any type of data. Hence, my idea of this blog has its origin in my datavis publications I ...
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Different winners under different criteria

August 21, 2018 | kjytay

A few posts ago (see here), I noted that there was a group of 7 teams in the English Premier League (EPL) that seem to be a cut above the rest: Arsenal Chelsea Everton Liverpool Manchester City Manchester United Tottenham … Continue reading →
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riddles on a line

August 21, 2018 | xi'an

In the Riddler of August 18, two riddles connected with the integer set Ð={2,3,…,10}: Given a permutation of Ð, what is the probability that the most likely variation (up or down) occurs at each term? Given three players choosing three different integers in Ð sequentially, and rewards in Ð allocated to the closest of the […]
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R Tip: Consider radix Sort

August 21, 2018 | John Mount

R tip: consider using radix sort. The “method = "radix"” option can greatly speed up sorting and ordering tables in R. For a 1 million row table the speedup is already as much as 35 times (around 9.6 seconds versus 3 tenths of a second). Below is an excerpt from an experiment sorting showing default … ...
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Styling ggplot2 Graphics

August 21, 2018 | Jumping Rivers

Styling ggplot2 graphics In our previous post, we demonstrated that contrary to popular opinion, it is possible to generate attractive looking plots using just base graphics. Although we did confess, that it did take a lot of time and effort. In this post, we repeat the same exercise. Using the ...
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Exploring correlations in R with corrr

August 21, 2018 | Simon Jackson

@drsimonj here to share a (sort of) readable version of my presentation at the amst-R-dam meetup on 14 August, 2018: “Exploring correlations in R with corrr”. Those who attended will know that I changed the topic of the talk, originally advertised... [Read more...]

Wrapping around ggplot2 with ggperiodic

August 20, 2018 | Code R

As an atmospheric scientists, a lot of my research consists on plotting and looking at global fields of atmospheric variables like pressure, temperature and the like. Since our planet is a sphere (well, almost), it is unbound and so longitude is a periodic dimension. That is, to the right of 180°...
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