R Weekly 2026-W40 knitr SQL Engine, Zulip, Snapshotting error messages

28 Sep 2026

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

Highlight

• The knitr SQL Engine Grows Up

• Zulip Chat for the R Project

• Snapshotting error messages

Insights

• Estimating Cross-Platform Usage Structure from Large-Scale Marginal Distributions and a Small Panel - Use a Gaussian copula to combine large-scale marginal usage distributions with dependence estimated from a small joint panel.

• RcppFastAD 0.0.5 on CRAN: Maintenance

• Snapshotting error messages

• Three New Debugging Aids in knitr

• The knitr SQL Engine Grows Up

• ParBayesianOptimization is back on CRAN

• Tangling Gets Smarter in knitr

• spin() Improvements in knitr

• More Capable Cache in knitr

• Better Tables with knitr::kable()

• A Four-Day knitr Issue/PR Backlog Sprint

R in Organizations

• Zulip Chat for the R Project

Tutorials

• Viterbi Decoding for Clinical Response Chains

• Bootstrap v traditional asymptotic normal assumptions by @ellis2013nz

• Relationship matrices without the matrix: fast pedigree computation in R with visPedigree

• SDM fitted before the invasion is over

• Neighbourhood colonisation and false jumps

• Genotype-environment scans under shared ancestry

• Quantitative Event-Driven Modeling: BTC Balance Sheet Shocks with SEC EDGAR Filings in R

• Friedman test in R, or the nonparametric version of the repeated measures ANOVA

Resources

• {styler} extension for Positron

New Packages

📦 Keep up to date wtih CRANberries 📦

CRAN

• {DCC} 1.2.1: Data Cleaning Center for Survey and Assessment Data

• {arity} 0.1.0: Format R Code with Arity

• {screenllm} 0.1.0: LLM-Assisted Title/Abstract Screening for Systematic Reviews

• {riskweightedassets} 1.1.1: Reproducible Risk-Weighted Asset Calculations

• {FIAstemmap} 2.0.0: Tree Canopy Modeling for USDA Forest Inventory and Analysis Plots

• {genoaligner} 1.0.0: GPU-Portable Pairwise Sequence Alignment (WFA + Smith-Waterman)

• {gcemod} 0.3.0: Generalized Competing Event Models with Lunn-McNeil Testing

• {funHMM} 0.1.0: Hidden Markov Models for Functional Data

• {shinyreact} 0.1.0: Client-Side ‘React’ Interface for ‘Shiny’

• {BasicStatsPlots} 0.1.0: Publication-Ready Data Visualization and Simple Statistical Inference

• {zot} 0.1.2: Access ‘Zotero’ Libraries

• {risq} 3.0.1: Representativity Indicators for Survey Quality

• {gtstats} 1.0.0: Beginner-Friendly Statistics and Publication-Ready Tables

Updated Packages

🔍 Search on R-universe 🔍

• {qol} 1.3.5: Powerful ‘SAS’ Inspired Concepts for more Efficient Bigger Outputs + diffify

• {ebrahim.gof} 2.7.0: Goodness-of-Fit and Calibration Tests for Logistic Regression - diffify

• {plssem} 0.1.4: Complex Partial Least Squares Structural Equation Modeling - diffify

• {boiwsa} 1.1.4: Seasonal Adjustment of Weekly Data - diffify

• {DemographicTable} 0.2.4: Create Demographic Table - diffify

• {birp} 0.9.0: Testing for Population Trends Using Low-Cost Ecological Count Data - diffify

• {landgraph} 0.0.3: Graphs and Covariance for Landscape Genetics - diffify

• {DEoptimR} 1.2-2: Differential Evolution Optimization in Pure R - diffify

• {cogmod} 0.3.3: Cognitive Models for Subjective Scales and Decision Making Tasks - diffify

• {spareg} 1.2.0: Sparse Projected Averaged Regression - diffify

• {mnt} 1.4: Affine Invariant Tests of Multivariate Normality - diffify

• {pdfsigner} 0.3.0: Digitally Sign and Verify PDF Documents - diffify

• {ggEDA} 0.3.0: Turnkey Visualisations for Exploratory Data Analysis - diffify

• {brar} 0.1.1: Null Hypothesis Bayesian Response-Adaptive Randomization - diffify

• {exametrika} 2.1.0: Test Data Engineering - diffify

• {cpfa} 1.3.3: Classification with Parallel Factor Analysis - diffify

• {rdborrow} 0.0.4.1: External Control Borrowing for Rare Disease Trials - diffify

• {oompaData} 3.1.7: Data to Illustrate OOMPA Algorithms - diffify

• {dynamicmultiplex} 1.3.1: Community Detection for Evolving Multiplex Networks - diffify

• {freesurferformats} 1.1.0: Read and Write ‘FreeSurfer’ Neuroimaging File Formats - diffify

• {ClassDiscovery} 3.4.11: Classes and Methods for “Class Discovery” with Microarrays or Proteomics - diffify

Videos and Podcasts

• Listen to the R-Weekly Highlights Podcast

Shiny Apps

• FIRSA Dashboard: FinTech in Europe - An R Shiny app for exploring European FinTech.

R Internationally

R Project Updates

Updates from R Core:

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

Connect

Join the Data Science Learning Community

Quotes of the Week

George Orwell on political language. pic.twitter.com/gltKiDcifA

— Philosophy Quotes (@philosophors) September 27, 2026