I’m still receiving questions about ESGtoolkit – a tool that I developped in 2014 for stochastic simulation – from time to time, even if it’s not really my current focus. As I also noticed recently, ESGtoolkit is downloaded a few times each month:

We are excited to announce the nse2r package. NSE (National Stock Exchange) is the leading stock exchange of India, located in the city of Mumbai. While users can manually download data from NSE through a browser, importing this data into R becomes cumbersome. The nse2r R package implements ...

A permutation challenge as Le weekly Monde current mathematical puzzle: When considering all games between 20 teams, of which 3 games have not yet been played, wins bring 3 points, losses 0 points, and draws 1 point (each). If the sum of all points over all teams and all games is 516, was is the […]

I’m currently developing a single-cell RNA Sequencing pipeline for NetworkAnalyst; an open source, web-based platform for comprehensive gene expression profiling & meta-analysis. The website uses mostly R code (via {RServe}???? ), Java for the he...

Cochran Theorem – from The distribution of quadratic forms in a normal system, with applications to the analysis of covariance published in 1934 – is probably the most import one in a regression course. It is an application of a nice result on quadratic forms of Gaussian vectors. More precisely, we can prove ...

In November 2019, Appsilon Data Science became an RStudio Full Service Certified Partner. We now officially provide support services for existing Shiny applications, Plumber APIs, and RStudio infrastructure. Further, we now provide Managed Services for the R environment. This means that we can handle ongoing support for your servers and infrastructure ...

The ‘predDensity’ function, included in the modEvA package since version 1.5 (currently available on R-Forge), produces a histogram and/or a kernel density plot of predicted values for observed presences and absences in a binomial GLM: Usage example:

Learn when and how to transform your variables for better insights.Photo by Arseny Togulev on UnsplashWhat is Data Transformation?Data Transformation in a statistics context means the application of a mathematical expression to each point in the data....

Recently I saw a tweet that shared this hilarious poster of Ramones “wants”. Dan Gneiding (aka Grayhood) is the graphic designer who created this. You can buy it here Very cool, but how accurate is it? I asked Dan and says he took some artistic license, as he should! You ...

A Shiny app to perform simple linear regression (by hand and in R) Simple linear regression is a statistical method to summarize and study relationships between two variables. When more than two variables are of interest, it is referred as multip...

In our last post on the SKEW index we looked at how good the index was in pricing two standard deviation (2SD) down moves. The answer: not very. But, we conjectured that this poor performance may be due to the fact that it is more accurate at prici...

In our last post on the SKEW index we looked at how good the index was in pricing two standard deviation (2SD) down moves. The answer: not very. But, we conjectured that this poor performance may be due to the fact that it is more accurate at pricing larger moves, ...

I was reading r/MapPorn and saw the image below: As fate would have it, the very first comment was from Guridkt who said, “I’d like to see asia too, i wonder if there’s a map of that. (sic)” So would I, so lets do it. About the ...