Monthly Archives: June 2015

Contours and Networks with epimap and rleafmap

June 30, 2015
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Contours and Networks with epimap and rleafmap

In February, I participated in a hackaton organized by Thibaut Jombart at Imperial College, London, to work on visualization tools for outbreak data. This was a great time spent with great people! Thanks again, Thibaut, for organizing. I took part … Lire la suite →

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Exploring SparkR

Exploring SparkR

A colleague from work, asked me to investigate about Spark and R. So the most obvious thing to was to investigate about SparkR -;)I installed Scala, Hadoop, Spark and SparkR...not sure Hadoop is needed for this...but I wanted to have the full picture -:)Anyway...I came across a piece of code that reads lines...

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Hot news detection using Wikipedia

June 29, 2015
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Hot news detection using Wikipedia

Wikipedia is, indeed, one of the largest free access crowdsourcing sources of information in today's world. Every day, thousands of people land on its pages to get information about different topics. Moreover, many machine learning algorithms (including text mining, semantic web, etc.) get their input from Wikipedia; for example, Google’s Knowledge Graph is mainly built around Wikipedia...

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Data Warehousing with R

June 29, 2015
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Under this link you can find today's slides from the Cardiff R User Group meeting. On the slides you may find interesting packages from the Data Warehousing / ETL perspective. Including few examples and a lot of links to packages repositories. Slides are fully reproducible, including connection via DBI, RJDBC and RODBC to Postgres and SQLserver. Script in _scripts dir....

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My Yahoo talk is now online

June 29, 2015
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Last week I gave a talk in the Yahoo! Big Thinkers series. The video of the talk is now online and embedded below.

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Get by with a little (R) help from your friends (at GitHub)

June 29, 2015
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Get by with a little (R) help from your friends (at GitHub)

@JennyBryan posted her slides from the 2015 R Summit and they are a must-read for instructors and even general stats/R-folk. She’s one of the foremost experts in R+GitHub and her personal and class workflows provide solid patterns worth emulation. One thing she has mentioned a few times—and included in her R Summit talk—is the idea

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Generalized Linear Mixed Models: the FAQ

June 29, 2015
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Mixed models (which include random effects, essentially parameters drawn from a random distribution) are tricky beasts. Throw non-Normal distributions into the mix for Generalized Linear Mixed Models (GLMMs), or go non-linear, and things get trickier still. It was a new field of Statistics when I was working on the Oswald package for S-PLUS, and even 20 years later some...

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Flow and Dynamics in NBA games – Part III

June 28, 2015
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In part I and II of this post series on NBA game dynamics, I explored both the average score differential and proportion of time spent in the lead for each NBA team. Interestingly, this proved to not be a very reliable proxy for overall performance and number of wins accrued over an entire season. To continue, I decided to...

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Everyone loves R markdown and Github; stories from the R Summit, day two

June 28, 2015
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Everyone loves R markdown and Github; stories from the R Summit, day two

More excellent talks today! Andrie de Vries of Microsoft kicked off today’s talks with a demo of checkpoint. This is his package for assisting reproducibility by letting you install packages from a specific date. The idea is that a lot of R packages, particularly those from PhD projects don’t get maintained, and suffer bitrot. That

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Shiny finally has a colour picker – use colourInput to select colours in Shiny apps

June 28, 2015
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Shiny finally has a colour picker – use colourInput to select colours in Shiny apps

I don’t always think Shiny is missing anything, but when I do - I fill in the gap myself. That was meant to be read as The Most Interesting Man In The World, but now that I think about it - maybe he’s not the type of guy who would be building Shiny R packages… Shiny has many useful...

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