R-bloggers - Part 27

Your Classifier Is Broken, But It Is Still Useful

January 8, 2025 | David Lindelöf

When you run a binary classifier over a population you get an estimate of the proportion of true positives in that population. This is known as the prevalence. But that estimate is biased, because no classifier is perfect. For example, if your classifier tells you that you have 20% of positive ...

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Little useless-useful R functions – QR-Code Clock

January 8, 2025 | tomaztsql

Ever wanted to have a clock on the wall or in the office, that is not binary. But it is QR-Code clock 🙂 Well, now you can have it. This useless R function generates new QR Code for every given…Read more ›

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Setting values in R6 classes, and testing with shiny::MockShinySession

January 7, 2025 | Colin Fay

You can read the original post in its original format on Rtask website by ThinkR here: Setting values in R6 classes, and testing with shiny::MockShinySession Context Recently, we worked on testing a {shiny} app that relies on values stored within the session$request object. This object is an environment ... [Read more...]

What’s a Pentomino Anyway?

January 7, 2025 | Chisato

Pakcages Used in This Blog Post library(tidyverse) # Easily Install and Load the 'Tidyverse' library(cowplot) # Streamlined Plot Theme and Plot Annotations for 'ggplot2' library(sf) # Simple Features for R library(patchwork) # The Composer of ...

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Little useless-useful R functions – Vanishing sentences

January 6, 2025 | tomaztsql

Let’s play with some words. More in particular with vanishing words. Using two packages: ggplot2 and gganimate we will construct a animation (looped), where sentences will be vanishing, word by word. A nice way to train the ggplot animations. The…Read more › [Read more...]

Just got a paper on conformal prediction REJECTED by International Journal of Forecasting despite evidence on 30,000 time series (and more). What’s going on?

January 4, 2025 | T. Moudiki

Extensive benchmark based on 30,000 time series (code provided in this post) and conformal prediction, with R and Python code provided [Read more...]

Recreating the Chaos of Taco Hat Cake Gift Pizza in R

January 4, 2025 | Chisato

🌮🎩🍰🎁🍕 Taco Hat Cake Gift Pizza with Monkey, Ninja, and Unicorn Over the Christmas holiday, my niece and nephew introduced me to Taco Cat Goat Cheese Pizza, a game that’s equal parts chaotic and hilarious. Imagine trying to slap a card while scr...

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Revisiting depression incidence by county and vote for Trump by @ellis2013nz

January 2, 2025 | free range statistics - R

Just before Christmas I blogged about the positive correlation between depression incidence in US counties and their vote for Trump in the 2024 presidential election. In addition to my casual interest in the topic, I used it as a case study in multilev...

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Some of the more useful Tidyverse functions

January 1, 2025 | tomaztsql

R functions for every data engineer using Tidyverse Tidyverse has long been an amazing collection of R packages, primarily for data engineering and data science. Common among these packages is the same language grammar, great design and structure, making data…Read more ›

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Once more ‘round the sun

December 31, 2024 | John MacKintosh

Vague plans for the year ahead [Read more...]

Once more ‘round the sun

December 31, 2024 | John MacKintosh

Vague plans for the year ahead [Read more...]

Leveraging AI to Enhance Functional Programming in 2025

December 30, 2024 | Teoten

Leveraging AI to Enhance Functional Programming in 2025 Functional programming has always stood out as an elegant approach to software development. Its focus on pure functions, immutability, and composability ensures clarity, predictability, and ea... [Read more...]

Generating a triangular navigation mesh from H3 hexagons in R

December 30, 2024 | Jonathan Chang

Introduction A navigation mesh is a data structure used to aid in pathfinding around obstacles. Originally used for video games and robotics, we can also apply the concept of this navigational mesh to the movement of...

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Unlocking CBRT Data in R: A Guide to the CBRT R Package

December 30, 2024 | M. Fatih Tüzen

The Central Bank of the Republic of Turkey (CBRT) provides a wealth of economic data crucial for researchers, analysts, and policymakers. Through the Electronic Data Delivery System (EVDS ), users can access time-series data on various econ...

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R and Python Together: Refactoring and Prompt Engineering A Previous Case Study, Using the Perplexity API

December 30, 2024 | Mark White

I wrote a post last year looking at how to employ tools in LangChain to have GPT-3.5 Turbo access information on the web, outside of its training data. The purpose of the present post is to revisit this post, improving the poor performance I saw there through refactoring and prompt ...

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Repost: Bluesky conversation analysis with local and frontier LLMs with R/Tidyverse

December 30, 2024 | Stephen Turner

Reposted from the original at https://blog.stephenturner.us/p/bluesky-analysis-claude-llama-tidyverse.Summary, translation, and sentiment analysis of Bluesky posts on a topic using atrrr, tidyverse/ellmer, and mlverse/mall with Claude and ot...

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Visualizing 445 Calendar in R

December 29, 2024 | Chisato

Have You Heard of the 4-4-5 Calendar? 📆 If you’ve worked in retail, you might already know that time isn’t always measured in standard months. Enter the 4-4-5 calendar: a reporting tool that divides a year into 12 periods, each organized into quarters of 4, 4, and 5 weeks (i.e. 13 ...

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Stock price forecasting with Deep Learning: throwing power at the problem (and why it won’t make you rich)

December 28, 2024 | T. Moudiki

Stock price forecasting with Deep Learning: throwing power at the problem (and why it won't make you rich)

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Getting back into blogging

December 27, 2024 | John Russell

Time since MƒA In one of my last posts 2 years ago, I mentioned that I would be looking for work and leaving MƒA. I ended up doubling down on my research background and becoming a part of EL Education’s Research Team, where I have taken an impr...

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Latent F1 team and driver performance: fun with Bayesian models

December 26, 2024 | Chris Bowdon

For a bit of fun, let’s try and model the performance of F1 drivers and constructors in the 2024 season using Bayesian models. The aim is to more to learn about using Stan than determine deep truths about F1, since there’s far more to performanc...

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