March 2017

Visualising Brexit Votes with Leaflet and cartogram

March 26, 2017 | Xinye Fiddles

On the eve of triggering Article 50, I think it’s semi-fitting to revisit the Brexit results. What’s the topic? The 2016 Brexit catastrophy (a.k.a. United Kingdom European Union membership referendum, 2016), specifically the visualisation of the results on a map, with each area (Local Authority in this case) proportioned ...
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Le Monde puzzle [#1001]

March 26, 2017 | xi'an

After a long lag (due to my missing the free copies distributed at Paris-Dauphine!), here is a Sudoku-like Le Monde mathematical puzzle: A grid of size (n,n) holds integer values such that any entry larger than 1 is the sum of one term in the same column and one term ...
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RcppTOML 0.1.2

March 26, 2017 | Thinking inside the box

A new release of RcppTOML is now on CRAN. This release fixes a few parsing issues for less frequently-used inputs: vectors of boolean or date(time) types, as well as table array input. RcppTOML brings TOML to R. TOML is a file format that is most suitable for configurations, as ... [Read more...]

New book and package pmfdR

March 26, 2017 | R and Finance

Processing and modelling financial data with R - My Portuguese book about finance and R was published a couple of months ago and, given its positive feedback, I decided to work on the english version immediately. You can find det... [Read more...]

RApiDatetime 0.0.2

March 25, 2017 | Thinking inside the box

Two days after the initial 0.0.1 release, a new version of RApiDatetime has just arrived on CRAN. RApiDatetime provides six entry points for C-level functions of the R API for Date and Datetime calculations. The functions asPOSIXlt and asPOSIXct conv... [Read more...]

Linear regression in “The Man who counted”

March 25, 2017 | tomaztsql

Recently, I got a book by Brasilian writer  Júlio César de Mello e Souza (published under pen name Malba Tahan), titled The Man who counted. Book is a collection of mathematical stories very similar to Scheherazada’s 1001 Nights, where mathematical story-telling is the center of book.                                                In story 5“...
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New Zealand election forecasts

March 25, 2017 | Peter's stats stuff - R

Over the weekend I released a new webpage, connected to this blog, with forecasts for the New Zealand 2017 General Election. The aim is to go beyond poll aggregation to something that takes the uncertainty of the future into account, as well as relati... [Read more...]

Suggests and Vignettes

March 24, 2017 | Iñaki

Dirk Eddelbuettel quite rightly reminded us the other day that Suggests is not Depends. I am sorry to say that I am one of those who are using Suggests… “casually”. Mea culpa. I must say that this is restricted to vignettes: there are no tests nor examples using suggested packages. ... [Read more...]

On a First Name Basis with Statistics Sweden

March 24, 2017 | Theory meets practice...

Abstract Jugding from recent R-Bloggers posts, it appears that many data scientists are concerned with scraping data from various media sources (Wikipedia, twitter, etc.). However, one should be aware that well structured and high quality datasets are available through state's and country's bureau of statistics. Increasingly these are offered to ... [Read more...]

Comparing subreddits, with Latent Semantic Analysis in R

March 24, 2017 | David Smith

FiveThirtyEight published a fascinating article this week about the subreddits that provided support to Donald Trump during his campaign, and continue to do so today. Reddit, for those not in the know, is an popular online social community organized into thousands of discussion topics, called subreddits (the names all begin ... [Read more...]

Building Shiny App Exercises (part-8)

March 24, 2017 | Euthymios Kasvikis

Transform your App into Dashboard Now that we covered the basic staff that you need to know in order to build your App it is time to enhance its appearance and its functionality. The interface is very important fot the user as it must not only be friendly but also ... [Read more...]

Superpixels in imager

March 24, 2017 | Simon Barthelme

Superpixels are used in image segmentation as a pre-processing step. Instead of segmenting pixels directly, we first group similar pixels into “super-pixels”, which can then be processed further (and more cheaply). (image from Wikimedia) The current version of imager doesn’t implement them, but it turns out that SLIC superpixels ...
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Writing a conference abstract the data science way

March 24, 2017 | Adnan Fiaz

Adnan Fiaz Conferences are an ideal platform to share your work with the wider community. However, as we all know, conferences require potential speakers to submit abstracts about their talk. And writing abstracts is not necessarily the most rewarding work … Continue reading →
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