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Comparison · Analytics
lubridate vs rstanarm
A side-by-side editorial comparison of lubridate and rstanarm — release velocity, themes, recent moves, and the top alternatives to consider.
lubridate vs rstanarm: at a glance
What is lubridate?
lubridate ships parsing fixes, timezone-data churn, and a long-overdue MIT relicense.
lubridate is R's standard package for date-time manipulation. Recent releases are dominated by parsing correctness — partial datetimes, multiple format strings, month names colliding with the %a format — and by adapting to timezone database changes in R-devel. Version 1.9.5 also relicensed the package to MIT.
What is rstanarm?
rstanarm is community-maintained now, tracking Stan and lme4 rather than adding models.
2.32.2 is entirely infrastructure and dependency work: formula machinery migrated from lme4 to reformulas, `r_eff` no longer computed for loo by default, the Stan R packages repo replaced by R-Universe, rstantools adopted to fix build and export errors, and CRAN NOTE cleanups — contributed largely by four first-time contributors. 2.32.1 and 2.26.1 follow the same pattern, tracking rstan syntax and adding `posterior::as_draws()` support. The last release with substantive modelling content is 2.21.1, which changed how default priors are determined and flipped `autoscale` to FALSE outside default priors.
lubridate vs rstanarm: editorial side-by-side
lubridate
0.0ANALYTICS
lubridate ships parsing fixes, timezone-data churn, and a long-overdue MIT relicense.
◆ Current state
lubridate is R's standard package for date-time manipulation. Recent releases are dominated by parsing correctness — partial datetimes, multiple format strings, month names colliding with the %a format — and by adapting to timezone database changes in R-devel. Version 1.9.5 also relicensed the package to MIT.
◆ Where it's heading
The feature surface has been stable since 1.9.0 deprecated the roll argument for roll_dst and added integer coercion for Duration, Period and Interval. What continues is a steady stream of parsing edge cases and tzdata churn the package absorbs on its users' behalf, which is most of what a date-time library's maintenance actually is.
◆ Prediction
Expect further releases driven by tzdata and R-devel changes, with parsing fixes arriving as locale and format edge cases get reported.
rstanarm
0.0ANALYTICS
rstanarm is community-maintained now, tracking Stan and lme4 rather than adding models.
◆ Current state
2.32.2 is entirely infrastructure and dependency work: formula machinery migrated from lme4 to reformulas, `r_eff` no longer computed for loo by default, the Stan R packages repo replaced by R-Universe, rstantools adopted to fix build and export errors, and CRAN NOTE cleanups — contributed largely by four first-time contributors. 2.32.1 and 2.26.1 follow the same pattern, tracking rstan syntax and adding `posterior::as_draws()` support. The last release with substantive modelling content is 2.21.1, which changed how default priors are determined and flipped `autoscale` to FALSE outside default priors.
◆ Where it's heading
The package has moved from feature development into ecosystem maintenance, and the contributor list shows why it survives: outside developers keep it compiling against a moving Stan, lme4 and CRAN. The `as_draws()` support and the reformulas migration both point the same way — rstanarm increasingly consumes shared infrastructure (posterior, reformulas, rstantools) instead of carrying its own.
◆ Prediction
Expect the next release to track another upstream change — rstan, reformulas or CRAN policy — rather than add model families. The pre-fit model surface looks settled.
Alternatives to lubridate and rstanarm
Other Analytics products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either lubridate or rstanarm.
writexl
writexl spent nine years refusing to do formatting, then shipped all of it in 2.0.0.
rgbif
rgbif is steadily pushing users off paged searching and onto real downloads.
taxa
taxa started a ground-up rewrite in 2021 and has published almost nothing since.
rotl
rotl's whole release history is keeping name matching honest against a moving taxonomy.
taxize
taxize spends its releases absorbing other people's API changes, one dead source at a time.
See all lubridate alternatives → · See all rstanarm alternatives →
Recent activity from lubridate and rstanarm
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 6mo agolubridatelubridate 1.9.5 relicenses to MIT and fixes timestamp order
- 6mo agolubridatelubridate 1.9.4 parses partial datetimes like as.POSIXct()
- 10mo agorstanarmrstanarm 2.32.2 migrates formula machinery to reformulas
- 2y agorstanarmrstanarm 2.32.1 fixes unit_vector error, enables LTO
- 2y agorstanarmrstanarm 2.26.1 adopts new rstan syntax and as_draws()
- 3y agolubridatelubridate 1.9.2 fixes month parsing when %a is present
- 3y agolubridatelubridate 1.9.1 accepts multiple formats in as_datetime()
- 3y agolubridatelubridate 1.9.0 replaces roll with an explicit roll_dst argument
- 4y agorstanarmrstanarm 2.21.3 fixes loo() and adds stan_jm offsets
- 5y agolubridatelubridate 1.7.10 fixes interval division across leap years
- 6y agorstanarmrstanarm 2.21.1 changes default prior behaviour
Frequently asked questions
What is the difference between lubridate and rstanarm?
They serve adjacent needs but don't currently overlap on shipped themes. lubridate and rstanarm are shipping at a similar cadence (velocity 0.0 vs 0.0, both within Sparkpulse's "active" band). See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is lubridate better than rstanarm?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. lubridate and rstanarm are shipping at a similar cadence (velocity 0.0 vs 0.0, both within Sparkpulse's "active" band). For your specific use case, the alternatives sections above list other Analytics products to evaluate alongside.
What are the best alternatives to lubridate?
Top lubridate alternatives in Analytics are ranked by recent ship velocity. Browse the "lubridate alternatives" section above for the current picks, or visit /alternatives/lubridate for the full list with editorial commentary on each.
What are the best alternatives to rstanarm?
Top rstanarm alternatives in Analytics are ranked by recent ship velocity. Browse the "rstanarm alternatives" section above for the current picks, or visit /alternatives/rstanarm for the full list with editorial commentary on each.