by Juan M. Lavista Ferres , Senior Director of Data Science at Microsoft In what was one of the most viral episodes of 2017, political science Professor Robert E Kelly was live on BBC World News talking about the South Korean president being forced out of office when both his kids decided ... [Read more...]

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High-level info If you build a model and never update it you’re missing a trick. Behaviours change so your model will tend to perform worse over time. You’ve got to regularly refresh it, whether that’s adjusting the existing model to fit the latest data (recalibration) or building ... [Read more...]

High-level info If you build a model and never update it you’re missing a trick. Behaviours change so your model will tend to perform worse over time. You’ve got to regularly refresh it, whether that’s adjusting the existing model to The post Versioning R model objects in ... [Read more...]

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Shiny Application Layouts – Shiny Themes In the last part of the series we will check out which themes are available in the shinythemes package. More specifically we will create a demo app with a selector from which you can choose the theme you want. This part can be useful for ... [Read more...]

In an earlier blog post I provided R code for a CI of a difference in R square for dependent and non-dependent correlations. This was based on a paper by Zou (2007). That paper also provides a method for calculating the CI of a difference in independent R square coefficients based ... [Read more...]

Data scientist Giora Simchoni recently published a fantastic analysis of the history of pop songs on the Billboard Hot 100 using the R language. Giora used the rvest package in R to scrape data from the Ultimate Music Database site for the 350,000 chart entries (and 35,000 unique songs) since 1940, and used those ... [Read more...]

Using the R programming language to draw the Sierpinski triangle fractal using the chaos game. Drawing a fractal using random numbers. Continue reading → The post The Sierpinski Triangle: Visualising infinity in R appeared first on The Devil is in the Data. [Read more...]

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A proposed solution in the R language to Euler Problem 22. What is the total of all the name scores in the file of 5163 first names? Continue reading → The post Euler Problem 22 : Names Scores appeared first on The Devil is in the Data. [Read more...]

Motivation We developed a easy to use and intuitive Event Study addin for the popular R IDE from RStudio. This addin is designed in view to our web frontend, but with the advantage that the user can immediately work with the results from R. Furthermor... [Read more...]

As also described in Cormen, et al (2009) p. 65, in algorithm design, divide-and-conquer paradigm incorporates a recursive approach in which the main problem is: Divided into smaller sub-problems (divide), The sub-problems are solved (conquer), And the solutions to sub-problems are combined to solve the original and “bigger” problem (combine). Instead of ... [Read more...]

Brute force approach to solving a problem is usually the way of running through all possible combinations and repeating a certain calculation. Until a more elegant solution is devised – for example finding a numerical formula – brute forcing is the only tool at hand. Provided that the nature of the calculation ... [Read more...]