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reproducibility-r

Reproducibility

Last reviewed Jun 1, 2026 Content v20260601
Track mode
server_script
Means
Server runner
Reading
~1 min
Level
advanced

This lesson

This lesson teaches Reproducibility: the syntax, patterns, and safety habits you need before advancing in R.

Teams still ship Reproducibility in R codebases—skipping it leaves gaps in debugging and code reviews.

You will apply Reproducibility in contexts like: Research pipelines, Shiny dashboards, and statistical reporting.

Write R in the editor and click Run on server—the dev runner executes with Rscript; use print() or cat() and base R in playground snippets (tidyverse locally; LEARNING_RUNNER_ENABLED=true).

When pointers, structs, and basic control flow from intermediate lessons are familiar.

Reproducible analysis means others can rerun your code and get the same results—set.seed(), renv, Git, and R Markdown knit to HTML/PDF.

Practices

  • Version control .R and .Rmd files
  • renv or renv.lock for package snapshots
  • Document data pulls from SQL with dated queries
  • Session info in reports (sessionInfo())

sessionInfo

print(sessionInfo())

Important interview questions and answers

  1. Q: Why renv?
    A: Isolates project library from system R—like Python venv or node lockfiles.
  2. Q: sessionInfo in reports?
    A: Proves R version and loaded packages at render time.

Self-check

  1. What fixes random number streams?
  2. What command shows R and package versions?

Tip: Pair renv with Git and documented SQL extracts for audit trails.

Interview prep

Why renv?

Pins exact package versions per project for CI and production reruns.

Interview tip Lesson completion confidence

Can you explain this lesson in 30 seconds without reading notes?

Not saved yet.

Playground

Runs on the configured server runner (dev: npm run runner with LEARNING_RUNNER_ENABLED=true). Output appears below the editor.

Check yourself

Multiple choice — immediate feedback.

Discussion

Past discussion is visible to everyone. Only logged-in users can post comments and replies.

Starter discussion topics

  • renv idea?
  • sessionInfo() when?

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