![Le Monde puzzle [#1132]](https://xianblog.files.wordpress.com/2015/10/lemondapari.jpeg?w=450&h=299&%23038;zoom=2)
A vaguely arithmetic challenge as Le weekly Monde current mathematical puzzle: Given two boxes containing x and 2N+1-x balls respectively. If one proceeds by repeatedly transferring half the balls from the even box to the odd box, what is the largest value of N for which the resulting sequence in one of the boxes covers
Intro: the need for microdata, and the risk of disclosure Survey and administrative data are essential for scientific research, however accessing such datasets can be very tricky, or even impossible. In...
In my last post, I examined the significance of the sector on the salary for different occupational groups using statistics from different regions. In previous posts I have shown...
And a new version of digest is getting onto CRAN now, and to Debian shortly. digest creates hash digests of arbitrary R objects (using the md5, sha-1, sha-256, sha-512,...
We have some really nifty upcoming enhancements to wrapr unpack/to. One of the new notations is the use of := as an alternate assignment operator for unpack/to. This lets...
BMI has an expectations management problem Body Mass Index (BMI) is an attempt to give a quick back-of-envelope answer to the question “if someone weighs W kg, is that a...
Following up on the initial RcppSimdJson release, a first updated arrived on CRAN yesterday. RcppSimdJson wraps the fantastic simdjson library by Daniel Lemire which truly impressive. Via some very...
Introduction It is almost the 29th of February 2020! A day that is very interesting for R, because it marks 20 years from the release of R v1.0.0, the first...
I’m proud to announce that my latest research project, reluctant generalized additive modeling (RGAM), is complete (for now)! In this post, I give a brief overview of the method:...
RBloggers|RBloggers-feedburner RAthena 1.7.1 and noctua 1.5.1 package versions have now been released to the CRAN. They both bring along several improvements with the connection to AWS Athena, noticeably the performance...
Introduction Correlation matrix Correlogram Correlation test Code Photo by Pritesh Sudra Introduction Correlation, often computed as part of descriptive statistics, is a statistical tool used to study the relationship between two variables, ...
TL;DRJust answer 4 questions about best degree for Data Science here: https://www.surveymonkey.com/r/7FGGWS7 No doubt asking the question "What's the best degree for Data Science?" one won't expect unified or...
It seems that the need for MX, DKIM, SPF, and DMARC records for modern email setups were just not enough acronyms (and setup tasks) for some folks, resulting in...
By Benaiah Ubah, Claudia Vitolo and Rick Pack Introduction Google Summer of Code (GSoC) is an annual 3-month open-source software development (coding) program that provides a platform for mentors...
Our past interrogation of the Voynich Manuscript has deconstructed its esoteric symbols into a form more suitable for our ends, subjected its statistical properties to comparison with more mundane...
The tidy data principles are a cornerstone of financial data management and the data modeling workflow. The foundation for tidy data management is the tidyverse, a collection of R...
At their closing keynote at the 2020 RStudio Conference, Hilary Parker and Roger Peng mentioned that they hatched the idea for their excellent Not So Standard Deviations podcast following...
In our last post, we introduced benchmarking as a way to analyze our hero’s investment results apart from comparing it to alternate weightings or Sharpe ratios. In this case,...
Introduction Historically there have been several instance of air plane crashes. This study is an attempt to explore the possible causes of such air crashes, and to determine if air...
This is a brief post on collecting and analysing tweets. I will show how to use the rtweet package to extract Twitter posts about the R community. This ties...
The DALEX package version 1.0 CRAN release is scheduled for Feb 20. It brings lots of improvements and changes. Below I will briefly summarise how this package helps to...
In 2014 we launched the EARL (Enterprise Application of the R Language) Conference aimed at connecting and inspiring business users... The post EARL Conference 2020 – Why YOU should Submit...
A few days ago, I came back on a sentence I found (in a French newspaper), where someone was claiming that “… an old variable explains 85% of the...
In one-dimensional \(^1\)H NMR spectroscopy, particularly biomolecular NMR, it is frequently necessary to align spectra before chemometric or metabolomics analysis. Poor alignment arises largely from pH and ionic strength...
This is a short story about a non-trivial bug in the processx package, and how I fixed it. It is a good showcase of the some debugging tools. The bug processx is...
A flexible framework for probabilistic forecasting of circular data is introduced, using distributional regression trees and random forests based on the...
Continuing our effort of applying the principles of reactivity to the UI part of a ShinyApp, this blog introduces two ways of conditionally rendering UI-elements in your app. Both...
R is one of the leading programming languages for data analysis. In April and October 2020 we will bring our popular trainings “Introduction to R“ and “Machine Learning with...
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