Fast Grouped Counts and Means in R
Grouped counts and grouped (weighted)
means? How to calculate them? And how to do it as fast as possible?
March 2025 Top 40 New CRAN Packages
In March, one hundred eighty-two new packages made it to CRAN. Here are my Top 40 picks in sixteen categories: Agriculture, Archaeology, Biology, Climate Modeling, Computational Methods, Data, Ecology, Epidemiology, Genomics, Machine Learning, M...
Spatial machine learning with R: caret, tidymodels, and mlr3
This is the first part of a blog post series on spatial machine learning with R.
The R language has a variety of packages for machine learning, and many of them can be used for machine learning tasks in a spatial context (spatial machine...
vowels: Phonetics cloze quiz about Cardinal vowels
Cloze exercise in which two randomly-selected Cardinal vowels have to be described according to the three parameters vowel height, frontness-backness, and lip rounding.
Name:
vowels
Type:
cloze
Preview:
Desc...
flags: Fun with Flags
Single-choice knowledge quiz question in which the correct flag for a country has to be selected from a list of flags.
Name:
flags
Type:
schoice
Related: capitals, countrycodes
Preview:
Which is the fl...
Explained vs. Predictive Power: R², Adjusted R², and Beyond
1 Introduction
You trust R². Should you?
You proudly present a model with R² = 0.95. Everyone applauds.
But what if your model fails miserably on the next new data?
When building a statistical model, one of the first numbers analysts and...
surveydown: An Open-Source, Markdown-Based Platform for Interactive and Reproducible Surveys workshop
Join our workshop on surveydown: An Open-Source, Markdown-Based Platform for Interactive and Reproducible Surveys, which is a part of our workshops for Ukraine series! Here’s some more info: Title:surveydown: An Open-Source, Markdown-Based Platform for Interactive and Reproducible Surveys Date: Thursday, May 29th, 18:00 – 20:00 CET (Rome, Berlin, Paris timezone) Speaker: ... [Read more...]
sumdiff: Sum Minus Difference
Exercise template for a very basic arithmetic task, namely computing the sum of two random numbers minus their difference.
Name:
sumdiff
Type:
num
Related: deriv
Preview:
By how much is the sum of the ...
Announcing… schematic
I’m thrilled to announce the release of schematic, an R package that helps you (the developer) communicate data validation problems to non-technical users. With schematic, you can leverage tidyselect selectors and other conveniences to compare i... [Read more...]
How the DSGE sausage is made
Introduction
Dynamic Stochastic General Equilibrium (DSGE) models are a class of models which attempt to model the entire economy of a nation. The purpose of this post is to hand-code a DSGE model in R, fit it to data, and check that the results agree...
rOpenSci News Digest, April 2025
Dear rOpenSci friends, it’s time for our monthly news roundup! You can read this post on our blog. Now let’s dive into the activity at and around rOpenSci!
rOpenSci HQ
Event: Career Paths for U.S. Federal Data Scientists
rOpenSci and O... [Read more...]
proximal sampler
At the Columbia workshop last week, Andre Wibisono presented work related with a recent arXival on the exponentially fast convergence of both unadjusted Langevin and proximal sampler algorithms under strong [definitely strong] log-concavity assumptions. The idea behind the proximal sampler is to target the demarginalised density by introducing an auxiliary ...
[R] How to create errorbars with overlaid points using ggplot
Zhenguo Zhang's Blog /2025/04/26/r-how-to-create-an-error-barplot-with-overlaid-points-using-ggplot/ -
library(ggplot2)
library(dplyr)
Sometimes you may want to create a plot with the following features:
a point to indicate the mean of a group
error...
World Economic Outlook by @ellis2013nz
This week the World Bank and International Monetary Fund “Spring Meetings” have been in progress, and a highlight is always the publication of the latest World Economic Outlook. This never fails to get a bit of press attention around the world. This ye...
‘Bayesian’ optimization of hyperparameters in a R machine learning model using the bayesianrvfl package
Example of use of bayesianrvfl package for Bayesian optimization of hyperparameters in a machine learning model
Function Generators vs Partial Application in R
In which I confront the way I read code in different languages, and end up
wishing that R had a feature that it doesn’t.
This is a bit of a thought-dump as I consider some code - please don’t take it
as a criticism of any design choices; ... [Read more...]
Character to Date conversion using lazy queries
Problem
How to convert a string with format DDMMYYYY, to a date type using lazy queries. The problem is that base r function as.Date() does not have a translatable SQL equivalent. More information on this is detailed in this sql translation art... [Read more...]
Bollinger Bands: Invesco CoinShares ETF
Source code: [Read more...]
Outreachy December 2024 Interns with Bioconductor
Introduction
Open source provides an accessible platform for individuals to develop and refine their skills while collaborating on real-world projects. For tech enthusiasts with little to no experience, contributing to open-source projects is a...
Shinyscholar – a template for producing reproducible analytic apps in R workshop
Join our workshop on Shinyscholar – a template for producing reproducible analytic apps in R, which is a part of our workshops for Ukraine series! Here’s some more info: Title: Shinyscholar – a template for producing reproducible analytic apps in R Date: Thursday, June 5th, 18:00 – 20:00 CEST (Rome, Berlin, Paris timezone) Speaker: ... [Read more...]
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