The dqrng package is now available from CRAN. It is possible to install it using install.packages("dqrng") Besides this simplified installation the included RNGs have been updated: Xorshift128+ and Xorshift1024* have been removed in favor of the new Xorshiro256+, c.f. http://xoshiro.di.unimi.it/. Using the provided ... [Read more...]

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R provides a lot of interesting packages to analyze cryptocurrency markets. The goal of this exercise is to introduce you to one of the packages (crypto) to retrieve cryptocurrency data in R, as well as building some basic plots to understand how these markets have behaved in recent times. Cryptocurrencies ... [Read more...]

This is a personal reflection after my experience working for more than two years at Datawheel. By no means my opinions reflect on my former employer. What I’ll try to explain here is this famous diagram from R4DS from an often uncovered approach:... [Read more...]

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New minor release of the R/exams package to CRAN, containing a wide range of smaller improvements and bug fixes. Notable new features include a dedicated OpenOLAT interface, and a convenience function facilitating the use of TikZ-based graphics. Version 2.3-1 of the one-for-all exams generator R/exams has been published ... [Read more...]

In Randomized Controlled Trials (RCTs), a “Pre” measurement is often taken at baseline (before randomization), and treatment effects are measured at one or more time point(s) after randomization (“Post” measurements). There are many ways to take the baseline measurement into account when comparing 2 groups in a classic pre-post design ... [Read more...]

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Reflections on AphA Scotland launch event - On Tues 8th May there was only one Scottish based member of the Association of Professional Healthcare Analysts (me) but on Wed 9th May that number rose to around 80 with the launch of the the Scotland AphA Branch. The event took place in ... [Read more...]

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Exercise template for assessing the interpretation of an automaton diagram (drawn with TikZ) based on randomly generated input sequences. Name: automaton Type: mchoice Related: logic Description: An automaton diagram with four states A-D is drawn with TikZ and is to be interpreted, where A is always the initial state and ... [Read more...]

Exercise template for matching logic gate diagrams (drawn with TikZ) to the corresponding truth table. Name: logic Type: schoice Related: automaton Description: Gate diagrams for three logical operators (sampled from: and, or, xor, nand, nor) are drawn with TikZ and have to be matched to a truth table for another ... [Read more...]

Madison Shake I had heard that the lines to get some food at Shake Shack are long. So when I saw a new location opening in downtown LA, I wondered how many locations does it have and how fast are they spreading across the US. The answers surprised me. Using ... [Read more...]

Introduction Code documentation is extremely important if you want to share the code with anyone else, future you included. In this second post in the RStudio:addins series we will pay a part of our technical debt from the previous article and document our R functions conveniently using a new ... [Read more...]