Abstract I present a method for reactively updating a table of acronyms from a Shiny interactive timeline using renderDataTable and timevis. The method is used in the new Shiny app, stratvis. The stratvis app The stratvis Shiny app provides a rich a... [Read more...]

Solution to Euler Problem 5 in the R Language for Statistical Computing: What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20? Continue reading → The post Euler Problem 5: Smallest Multiple appeared first on The Devil is in the Data. [Read more...]

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Currently the news are filled with articles about the rise of machine intelligence, artificial intelligence and deep learning. For the average reader it seems that there was this single technical breakthrough that made AI possible. While I strongly bel... [Read more...]

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Switzerland is a country with lots of mountains, and several large lakes. While the political subdivisions (called municipalities) cover the high mountains and lakes, nothing much of economic interest happens in these places. (Raclette and sailing are wonderful, but don't count for our purposes.) For this reason, the Swiss Federal ... [Read more...]

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Yesterday we published our 100th set of exercises on R-exercises. Kudos and many thanks to Avi, Maria Elisa, Euthymios, Francisco, Imtiaz, John, Karolis, Mary Anne, Matteo, Miodrag, Paritosh, Sammy, Siva, Vasileios, and Walter for contributing so much great material to practice R programming! Even more thanks to Onno, who is ... [Read more...]

A year ago i wrote about a way to authenticate shiny with Auth0, using Apache: http://blog.datascienceheroes.com/adding-authentication-to-shiny-open-source-edition/ This method works but has some issues, Sebastian Peyrott has written an excellent new blogpost that explains how to add authentication to the Open Source edition of Shiny from scratch, [Read more...]

A week before Christmas our CTO, Marek Rogala gave a speech about ways to make Shiny apps do much more than usual during R enthusiasts meeting in Warsaw. In case you have missed this event we have published his presentation online: NOTE! in this pr... [Read more...]

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Abstract I updated the R code to accompany Chapter 2-4 of the book “Real-World Machine Learning” by Henrik Brink, Joseph W. Richards, and Mark Fetherolf to be more consistent with the listings and figures as presented in the book. rwml-R Chapters... [Read more...]

(Just from my point of view as a package maintainer.)New users of R might not appreciate the full benefit of CRAN and new package maintainers may not appreciate the importance of keeping their packages updated and free of warnings and errors. This is something I only came to realize ... [Read more...]

Some time ago I wrote a post about orthogonal regression. This is where we fit a regression line so that we minimize the sum of the squares of the orthogonal (rather than vertical) distances from the data points to the regression line.Subsequently, I received the following email comment:"Thanks ... [Read more...]

An R tutorial by D. M. Wiig This posting contains an embedded Word document. To view the document full screen click on the icon in the lower right hand corner of the embedded document.     [Read more...]

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Answers to the exercises are available here. Exercise 1 Consider 3 vectors, day, month and year: year=c(2005:2016) month=c(1:12) day=c(1:31) Define a list Date such as: Date= $year [1] 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 $month [1] 1 2 3 4 5 6 7 8 9 10 11 12 $day […] [Read more...]

by Le Zhang (Data Scientist, Microsoft) and Graham Williams (Director of Data Science, Microsoft) In data science, to develop a model with optimal performance, exploratory experiments on different sets of hyper-parameters are often performed. Preliminary analyses on smaller data can be performed on a single machine, while the experimental one ... [Read more...]

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