Like most people you will have used a search engine lately, like Google. But have you ever thought about how it manages to give you the most fitting results? How does it order the results so that the best are on top? Read on to find out! The earliest search engines either had human curated … Continue reading "Google’s...
Many times, for instance when teaching, I needed to quickly and simply generate a perfectly normally distributed sample to illustrate or show some of its characteristics. This is now very...
Last month we released a new version of pdftools and a new companion package qpdf for working with pdf files in R. This release introduces the ability to perform...
The NBA playoffs are in full swing! A total of 16 teams are competing in a playoff-format competition, with the winner of each best-of-7 series moving on to the...
Now that I've completed seven detailed reviews of Graphical User Interfaces (GUIs) for R, let's try to compare them. It's easy enough to count their features and plot them,...
![Le Monde puzzle [#1094]](https://xianblog.files.wordpress.com/2015/10/lemondapari.jpeg?w=275&h=183&zoom=2)
A rather blah number Le Monde mathematical puzzle: Find all integer multiples of 11111 with exactly one occurrence of each decimal digit.. Which I solved by brute force, by...
Experiences with using R/exams for written exams in finance classes with a moderate number of students at Texas A&M International University (TAMIU). ...
I thought I would give a personal update on our book: Practical Data Science with R 2nd edition; Zumel, Mount; Manning 2019. The second edition should be fully available...
Today I am happy to announce a new free course: Help Your Team Learn R! Over the last few years I’ve helped a number of data teams train their...
Biodiversity citizen scientists use iNaturalist to post their observations with photographs. The observations are then curated there by crowd-sourcing the identifications and other trait related aspects too. The data...
Great data science work should be reproducible. The ability to repeat experiments is part of the foundation for all science, and reproducible work is also critical for business applications. Team collaboration,...
![survivalists [a Riddler’s riddle]](https://s0.wp.com/latex.php?latex=F%28x%29%3D%5CBbb+P%28X%5Cle+x%29%3D1-a%5E%7Bx%7D&bg=000000&%23038;fg=B0B0B0&%23038;s=0)
A neat question from The Riddler on a multi-probability survival rate: Nine processes are running in a loop with fixed survivals rates .99,….,.91. What is the probability that the...
After working on the MOB package, I received requests from multiple users if I can write a binning function that takes the weighting scheme into consideration. It is a...
The Australian Election Study is an impressive long term research project that has collected the attitudes and behaviours of a sample of individual voters after each Australian federal election...
In this post, we will solve a simple problem (called "FizzBuzz") that is asked by some employers in data scientist job interviews. The question seeks to ascertain the applicant's...
Recap In the last post, the discipline of event log and process mining were defined. The bupaR package was introduced as a technique to do process mining in R. Objectives for...
Today, I am finally getting around to writing this very sad blog post: Before you take my DataCamp course please consider the following information about the sexual harassment scandal...
After wrapping up the function batch_woe() today with the purpose to allow users to apply WoE transformations to many independent variables simultaneously, I have completed the development of major...
Most of the shiny apps have tables as the primary component. Now lets say you want to prettify your app and style the tables. All you need understand how...
Latent Profile Analysis (LPA) tries to identify clusters of individuals (i.e., latent profiles) based on responses to a series of continuous variables (i.e., indicators). LPA assumes that there are...
I got an email from Alex Zanidean, who runs the xmrr package “You might enjoy my package xmrr for similar charts – but mine recalculate the bounds automatically” and if...
It's Easter Time! Let's find some eggs... Hi there! Yes, it's the most Easterful time of the year again. For some of us a sacret time, for others mainly an...
R programmers are not necessary data scientists, but rather software engineers. We have an entirely new multitrack focus area that helps engineers learn AI skills – AI for Engineers....
A new version 0.1.2 of the tint package is arriving at CRAN as I write this. It follows the recent 0.1.1 release which included two fabulous new vignettes...
My eye was caught by this tweet by Robin Wigglesworth of the Financial Times with an Alan Smith animation of the US Treasury yield curve from 2005 to 2009....
Confession time: years ago, I was skeptical of podcasts. I was a music-only listener on commutes. Can you imagine? But around 2016, I gave in and finally took the...
For my research I needed to download gridded weather data from ERA-Interim, which is a big dataset generated by the ECMWF. Getting long term data through their website is...
Metadata are an essential part of a robust data science workflow ; they record the meaning of each variable : its units, quality, allowed range, how we collect it,...
In this post we are talking about one of the most unintuitive results of statistics: the so called false positive paradox which is an example of the so called...
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