R Weekly 2026-W39 Sessioncheck 0.2, Spreadsheet Ghosts, Observed Power

21 Sep 2026

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This week’s release was curated by Colin Fay, with help from the R Weekly team members and contributors.

Highlight

• Release: sessioncheck 0.2

• Ghosts of spreadsheets past

• Observed power tells you nothing

Insights

• AI Newsletter: New releases from ellmer, shinychat, and commons
• Why ggseg Atlases Became Function Calls
• Ghosts of spreadsheets past

• Happy Birthday rOpenSci — My Journey from First-Time Developer to Current Opportunities

R in the Real World

• Sample size needed for central limit theorem to kick in by @ellis2013nz
• TidyTuesday 2026/37

R in Organizations

• What’s Your Workflow?: Synthetic SDTM From an NCT ID

R in Academia

• From BirdNET Detections to Ecological Insight: Sunny Tseng on birdnetTools 2.0

Tutorials

• Observed power tells you nothing

• Model-agnostic prediction intervals in Python and R: does nnetsauce’s QuantileRegressor hold up?
• The Pattern Behind Every Lua Filter We Write
• Keeping Quarto Themes Separate
• Colored Text, Two Outputs, One Filter
• PET-PEESE and publication bias under heterogeneity
• Likert items: when group means lie
• Heatwave counts: persistence, rule order, warming

Resources

• coreval: check SDTM, SEND and USDM data against CDISC Open Rules from R, offline

New Packages

📦 Keep up to date wtih CRANberries 📦

CRAN

• Introducing commons
• {sclValid} 0.1.1: Ensemble Validation and Ranking of Clustering Methods
• {celliverse} 0.0.2: An Ecosystem for Exploring the Universe of Single-Cell Data
• {NGSToolKit} 0.1.4: RNA-Seq Analysis and Genome Visualization ‘Shiny’ Platform
• {basetable} 1.4.2: Fast and Memory-Efficient Base R Table Manipulation
• {cauchyreg} 1.0: Cauchy Regression
• {janssonr} 0.1.2: Strict JSON Encoding and Decoding via the ‘Jansson’ C Library
• {geosmooth} 0.1.0: Geometric Smoothing and Conditional Expectation Methods
• {Compositionalscsmr} 1.0: Simplical-Simplicial Spatial Median Regression for Compositional Data
• {varmapack} 0.1.2: Burn-in-Free Simulation and Analysis of Gaussian VARMA Models
• {RobustArithmetic} 0.2.0: Verified Interval Arithmetic with Correctly Rounded Kernels
• {smrlasso} 1.0: LASSO Spatial Median Regression
• {USPopulationSampler} 0.1.1: Population-Weighted Sampling of Geographic Locations in the United States
• {matSPACE} 0.2.1: Sparse Partial Correlation Estimation for Matrix-Variate Data
• {AutoEDA} 0.1.1: Automatic Exploratory Data Analysis
• {cogmod} 0.3.0: Cognitive Models for Subjective Scales and Decision Making Tasks
• {rankMANOVA} 0.1.1: Rank-Based Tests for Multivariate Data in Nonparametric Factorial Designs
• {autotest} 0.2.0: Automatic Package Testing
• {OptOR} 0.1.0: Optimal Hyperrectangular Operating Regions
• {MobilityDataPT} 1.0: Get Mobility Related Data for Portugal
• {qpost} 1.1.0: Create a ‘Quarto’ Blog Post
• {AMRsurveilR} 0.1.0: Antimicrobial Resistance Surveillance, Epidemiology and Risk Analysis
• {postvocs} 0.2.5: Post-Processing Tools for GC-MS Volatile Organic Compound Data
• {marcxmlr} 0.1.0: Faithful and Scalable MARCXML Parsing
• {actisensorlog} 0.2.0: Summarize ‘SensorLog’/’SensorLogger’ Activity Data
• {rdatagouv} 0.1.0: Tools to Download and Explore Datasets from Data.gouv.fr
• {NeuralSTATIS} 0.1.0: Neural Network Enhanced STATIS Methodology for Three-Way Data Analysis
• {pilotr} 0.3.0: Simulate Experimental and Behavioural Data from a Portable Design Specification
• {ibist} 0.1-0: Data and Functions for Introduction to Biostatistics with R
• {metaGLMM} 1.0.0: Aggregate-Data Meta-Analysis with Generalized Linear Mixed Models
• {FocusGroup} 0.5.2: Focus Group Simulation Using LLM Agents
• {fdic} 0.1.2: Interface to ‘BankFind Suite API’
• {OmicsBraid} 0.2.3: Covariance-Aware Inference of Cross-Omic Effect Trajectories
• {badcontrols} 1.0.1: Difference-in-Differences with Bad Controls
• {ProMetaR} 1.0.0: Meta-Analysis of Proportions and Prevalence
• {visual.kaito} 0.1.0: Interactive 3D Visualizations for Group Comparisons
• {strategyr} 0.1.7.1: Execution-Oriented Strategy Workflows for Dynamic Trading Decisions
• {krt} 0.1.0: Author, Validate, and Export Key Resources Tables
• {sync3d} 0.1.1: Synchronized 3D Vector and Marker Animations in ‘Plotly’
• {LLMRpanel} 0.6.1: Benchmarked Silicon Samples for Survey and Experiment Design
• {fspls2} 0.1.0: A Package to Find Minimal Transcriptional Signatures

Bioconductor

GitHub or Bitbucket or GitLab

Updated Packages

🔍 Search on R-universe 🔍

ast2ast 1.0 - R-to-C++ translation package, now with linear algebra and automatic differentiation support.

• ellmer 0.5.0
• Complete chat applications in shinychat: R 0.5.0 and Python 0.7.1
• Release: sessioncheck 0.2

• td 0.0.7 on CRAN: New Features and Updates
• Little update plates
• {xfun} 0.61: Supporting Functions for Packages Maintained by ‘Yihui Xie’ - diffify
• {tinytex} 0.61: Helper Functions to Install and Maintain TeX Live, and Compile LaTeX Documents - diffify
• {readxl} 1.5.0.1: Read Excel Files - diffify
• {selectr} 0.7-0: Translate CSS Selectors to XPath Expressions - diffify
• {spatstat.geom} 3.8-3: Geometrical Functionality of the ‘spatstat’ Family - diffify
• {odbc} 1.7.1: Connect to ODBC Compatible Databases (using the DBI Interface) - diffify
• {metafor} 5.2-1: Meta-Analysis Package for R - diffify
• {tinytable} 0.19.0: Simple and Configurable Tables in ‘HTML’, ‘LaTeX’, ‘Markdown’, ‘Word’, ‘PNG’, ‘PDF’, and ‘Typst’ Formats - diffify
• {leaflegend} 1.3.0: Add Custom Legends to ‘leaflet’ Maps - diffify
• {MatchIt} 4.8.0: Nonparametric Preprocessing for Parametric Causal Inference - diffify
• {estimatr} 2.0.0: Fast Estimators for Design-Based Inference - diffify
• {leaflet.extras} 2.1.0: Extra Functionality for ‘leaflet’ Package - diffify
• {missMDA} 1.23: Handling Missing Values with Multivariate Data Analysis - diffify
• {geoarrow} 0.4.4: Extension Types for Spatial Data for Use with ‘Arrow’ - diffify
• {randomForestSRC} 3.8.0: Fast Unified Random Forests for Survival, Regression, and Classification (RF-SRC) - diffify
• {baseline} 1.3-7: Baseline Correction of Spectra - diffify
• {ftExtra} 0.6.5: Extensions for ‘Flextable’ - diffify
• {leaflet.extras2} 1.3.4: Extra Functionality for ‘leaflet’ Package - diffify
• {Boom} 0.9.17: Bayesian Object Oriented Modeling - diffify
• {NetSimR} 0.3.0: Actuarial Functions for Non-Life Insurance Modelling - diffify
• {TraMineR} 2.2-14: Trajectory Miner: a Sequence Analysis Toolkit - diffify
• {rxode2ll} 2.0.18: Log-Likelihood Functions for ‘rxode2’ - diffify
• {precrec} 0.24.0: Calculate Accurate Precision-Recall and ROC (Receiver Operator Characteristics) Curves - diffify
• {SqlRender} 1.19.6: Rendering Parameterized SQL and Translation to Dialects - diffify

Videos and Podcasts

• Listen to the R-Weekly Highlights Podcast

R Internationally

• Cartes du monde avec R : projections, graticules et palettes

R Project Updates

Updates from R Core:

• New Tricks for the R Sweave Drivers

Upcoming Events in 3 Months

Events in 3 Months:

• A list of R conferences and meetings

• This week’s local R-User and applied stats events

• Weekly R Workshops for Ukraine

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