The riddle set by The Riddler of last week sums up as follows: Within a population of size N, each individual in the population independently selects another individual. All individuals selected at least once are removed and the process iterates until one or zero individual is left. What is the ...

Reference electrode potentials Standard hydrogen electrode Calomel electrode Silver-silver chloride electrode The absolute potential scale Notes Convert to or from any* electrode scale Plotting the dataset A very simple interactive demo Bibliography SessionInfo References A quickly put-together post on the relationships between common electrochemical reference electrode potentials and the vacuum ...

Using R to add data to maps has been pretty straightforward for a few years now. That said, it seems easier than ever to do things like use map APIs (e.g. Google, Open Street Map), overlay quite complex data visualisations (e.g. “heatmap-style” densities) and even generate animations. A ...

It is a bit of a shock when R dplyr users switch from using a tbl implementation based on R in-memory data.frames to one based on a remote database or service. A lot of the power and convenience of the dplyr notation is hard to maintain with these more ...

By some piece of luck I came across a paper by the late George Marsaglia, genial contributor to the field of simulation, and Wai Wan Tang, entitled The Monty Python method for generating random variables. As shown by the below illustration, the concept is to flip the piece H outside ...

You have spent months collecting data, some participants turn up on time, some participants turn up late, and others do not show up at all. After all this, all you want to do is get down to analysing your data and writing up your results. However, before you do all ...

In this post, we are going to see how to deploy R, RStudio, and Shiny apps on a virtual server. The post won’t focus on Shiny programming aspect, neither on Unbuntu programming, however, the tutorial is self-sufficient. Only by following the different steps, you’ll get a working server ...