Carmichael number, more or less
A quick-and-dirty R resolution of a riddle from The Riddler, namely to find a Carmichael number of the form abcabc: library(numbers) for(i in 1:9) for(j in 0:9) for(k in 0:9){...continue reading.
Category: R
truncated mixtures
A question on X validated about EM steps for a truncated Normal mixture led me to ponder whether or not a more ambitious completion [more ambitious than the standard component...continue reading.
Data Cleaning in R: 2 R Packages to Clean and Validate Datasets
Real-world datasets are messy. Unless the dataset was created for teaching purposes, it’s likely you’ll have to spend hours or even tens of hours cleaning it before you can show...continue reading.
Little useless-useful R functions – Finding total sum of all sub-arrays and sum of maximums
When it comes to O(N log(N)) time complexity functions, this is the right section. ???? Given an array of natural numbers (later, you will see, it can be real, or...continue reading.
Little useless-useful R functions – Animating datasets
I firmly believe that animation and transition between different data states can give end-users much better insights and understanding of the data, than a single table with data points or...continue reading.
null recurrent = zero utility?
The stability result that the ratio converges holds for a Harris π-null-recurrent Markov chain for all functions f,g in L¹(π) [Meyn & Tweedie, 1993, Theorem 17.3.2] is rather fascinating. However,...continue reading.
How to Deploy RStudio Connect into Local Kubernetes Cluster
RStudio Connect is a publishing platform that lets you and your team share R Shiny applications, R Markdown reports, APIs, dashboards, Jupyter Notebook, and interactive Python content in one convenient...continue reading.
torch outside the box
Sometimes, a software’s best feature is the one you’ve added yourself. This post shows by example why you may want to extend torch, and how to proceed. It also explains...continue reading.
R and Excel: How to Combine the Best of Both Worlds
R and Excel go together like macaroni and cheese. There’s no need to choose one over the other, as there are numerous packages and extensions that allow them to work...continue reading.
Shiny Workshops and Tutorials – Appsilon Shiny Conference
The Appsilon Shiny Conference begins next week! And yes, there’s still time to register at the Shiny Conference Hopin! Whether a Shiny beginner or an experienced web developer, the Shiny...continue reading.
riddle of the week
The Riddler of April 1 offered this simple question: start with the number 1 and then try to reach a target number through a series of steps. For each step,...continue reading.
Why R is My Favorite Language for “First Time” Data Scientists
Probably the most common question I get from new data science students is, “Which language should I learn … R or Python?” This is a somewhat complex question to answer,...continue reading.
Keeping Those SSH Keys Safe
I came across a neat site that uses a Golang wasm function called from javascript on the page to help you see if your GitHub public SSH keys are “safe”....continue reading.
Simple R merge method and how to compare it with T-SQL
Merge statement in R language is a powerful, simple, straightforward method for joining data frames. Nevertheless, it also serves with some neat features that give R users fast data wrangling....continue reading.
Ever wondered how the probability of the null hypothesis being true changes given a significant result?
TRIGGER WARNING: These simulations might fundamentally shake your belief system. USE WITH CARE. In a recently accepted paper in the open access journal Quantitative Methods for Psychology that Daniel Schad...continue reading.
Appsilon Shiny Conference Panels
The first annual Appsilon Shiny Conference – a conference for Shiny enthusiasts everywhere – is almost here. If you haven’t already, be sure to register and join the 1600+ Shiny...continue reading.
Windows update: JAGS 4.3.1 is released
JAGS version 4.3.1 is now available from Sourceforge. This is a patch update with a singular purpose: to allow a new Windows binary to be built using the Rtools42 toolchain....continue reading.
a simpler (?) birthday problem
A monthly birthday problem from the Riddler: What was the probability that none of the 40 people had birthdays this month? What is the probability that there is at least...continue reading.
R Shiny in Government – Top 7 Dashboards You Should See
R Shiny allows developers to write production-ready dashboards in no time, and for any use case. It’s not rare to find a vast number of dashboards in business-related domains, such...continue reading.
Python and R have matrix and simple loops. What can you use in T-SQL?
Many of you have already used any programming or scripting language. And you can tell that, there are some functionalities that are intuitive (for loops, enumerations, collections, …), data types...continue reading.
