We are working on a series of comic books that introduce statistical thinking and could be used as activity booklets in primary schools. Stories are built around adventures of siblings: Beta (skilled mathematician) and Bit (data hacker). What is the connection between these comic books and R? All plots are ... [Read more...]

Mathematics knows no races or geographic boundaries; for mathematics, the cultural world is one country (David Hilbert) One of the best decisions I took this year related with this blog was to move it to my own self-hosted domain using WordPress.org. It allows to me, for example, to embed ... [Read more...]

The environmental Kuznets curve hypothesizes an inverted u-shape relationship between income and environmental degradation: while richer countries tend to invest more ressources into environmental protection as their income rises, income growth in poor... [Read more...]

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I was pleased to see today’s post, “(A Very) Experimental Threading in R,” by Lukasz Bartnik, as this is a long-standing interest of mine. My own effort in this direction has been my package Rdsm. The notion of threading, for those who may not have this background, refers to ... [Read more...]

In preparing the following example for my forthcoming book, I was startled by how different two implementations of Classification and Regression Trees (CART) performed on a particular data set. Here is what happened: For my example, I first used the Vertebral Column data set from the UCI Machine Learning Repository. ... [Read more...]

Well, I tried to write a blog post using the RStudio Rmarkdown system, and utterly failed. Thus, I set up a system where I could write from RStudio. So I set up a Github pages blog at randomjohn.github.io. There I can easily write and publish posts involving data ... [Read more...]

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Note to self – Remember to serialize R objects as RDS files when it makes sense. Importing Stata data into R The European Social Survey recently announced that it had added Round 7 of its survey to its cumulative dataset, which can be downloaded in CSV, SPSS or Stata format. While my ... [Read more...]

Abstract We present experiences from organizing a small R hackathon aimed at advancing knowledge and documentation of the R package surveillance. The hackathon was piggybacked on the ESCAIDE2016 conference visited by current and potential package users in the area of infectious disease epidemiology. The output of the hackathon is available ... [Read more...]

The Type-I Pareto distribution has a probability function shown as below f(y; a, k) = k * (a ^ k) / (y ^ (k + 1)) In the formulation, the scale parameter 0 __ a __ y and the shape parameter k __ 1 . The positive lower bound of Type-I Pareto distribution is particularly […] [Read more...]

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Descriptive Analytics is the examination of data or content, usually manually performed, to answer the question “What happened?”. In order to be able to solve this set of exercises you should have solved the part 0, part 1, part 2,part 3, and part 4 of this series but also you should run this script ... [Read more...]

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Learning data science is a long path well described in this datacamp’s post. And as any skill, the best way to get it is to practise! Then, I would like to start some pet projects clearly distinct from my work projects. This way I could test as I w... [Read more...]

GeoJSON is a standard text-based data format for encoding geographical information, which relies on the JSON (Javascript object notation) standard. There are a number of public datasets for Greenville, SC that use this format, and, the R programming language makes working with these data easy. Install the rgeojson library, which ... [Read more...]