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Comparison · Analytics
ibdsim2 vs reproducible
A side-by-side editorial comparison of ibdsim2 and reproducible — release velocity, themes, recent moves, and the top alternatives to consider.
ibdsim2 vs reproducible: at a glance
What is ibdsim2?
A pedigree IBD simulator that absorbed its own web app and now optimises for dense marker panels.
ibdsim2 simulates identity-by-descent sharing along chromosomes for arbitrary pedigrees, in both autosomal and X-chromosomal form, with downstream tools for segment statistics, pattern finding and distribution plots. Since 2.1.0 the Shiny front end lives inside the package and launches via launchApp() rather than sitting in a separate repository. The latest release is performance work, with profileSimIBD() substantially sped up for dense marker panels and ibdsim() skipping recombination in pedigree branches that cannot affect the result.
What is reproducible?
reproducible added a windowed read path so remote GeoTiffs never fully download
reproducible provides caching and input-preparation tooling for R workflows, with prepInputs() as the central entry point for fetching, cropping and post-processing spatial data. Only two releases are on record here, both from May 2026 and two days apart: a feature release followed immediately by a CRAN-triggered patch.
ibdsim2 vs reproducible: editorial side-by-side
ibdsim2
2.5ANALYTICS
A pedigree IBD simulator that absorbed its own web app and now optimises for dense marker panels.
◆ Current state
ibdsim2 simulates identity-by-descent sharing along chromosomes for arbitrary pedigrees, in both autosomal and X-chromosomal form, with downstream tools for segment statistics, pattern finding and distribution plots. Since 2.1.0 the Shiny front end lives inside the package and launches via launchApp() rather than sitting in a separate repository. The latest release is performance work, with profileSimIBD() substantially sped up for dense marker panels and ibdsim() skipping recombination in pedigree branches that cannot affect the result.
◆ Where it's heading
Two long-running threads. One is the app as a first-class part of the package, which has been getting input validation, dependency checks and plotting fixes release after release, treating a research GUI as software to be maintained rather than a demo. The other is numerical care: the built-in recombination map was rebuilt in 2.3.0 with better chromosome endpoints and a thinning algorithm that cut it from about 38,000 points to 14,000 without losing accuracy, and IBD segment merging has been made consistent across the realised-coefficient functions. The maintainer flags repeatedly that seeded results may differ across versions, which is the right disclosure for a simulator used in published analyses.
◆ Prediction
The recent work points at further speed on dense panels and continued hardening of app input handling, both of which have appeared in each of the last several releases. Nothing here signals a new modelling capability on the way.
reproducible
0.0ANALYTICS
reproducible added a windowed read path so remote GeoTiffs never fully download
◆ Current state
reproducible provides caching and input-preparation tooling for R workflows, with prepInputs() as the central entry point for fetching, cropping and post-processing spatial data. Only two releases are on record here, both from May 2026 and two days apart: a feature release followed immediately by a CRAN-triggered patch.
◆ Where it's heading
3.1.0 adds prepInputsCOG, a fast path inside prepInputs for remote tiled GeoTiffs including Cloud Optimized GeoTiffs. When the URL is HTTP(S) and any of to, cropTo or maskTo is supplied, only the spatial window of interest is fetched through GDAL's /vsicurl/, and the resulting windowed SpatRaster continues through the normal post-processing pipeline. The same release renames the inputPaths options to the destinationPathShared family with backwards-compatible aliases and a deprecation message, and lets alsoExtract accept regex patterns.
◆ Prediction
The COG path being opt-out via options(reproducible.useCOG = FALSE) suggests confidence in it as a default, so wider application across the prepInputs family is the plausible next step. Two entries is a thin base for predicting cadence.
Alternatives to ibdsim2 and reproducible
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 ibdsim2 or reproducible.
spsurvey
spsurvey has spent four years consolidating after its 5.0.0 rewrite rather than adding to it
StreamCatTools
StreamCatTools is quietly moving off web services and onto cloud-native GeoParquet
qcTAF
qcTAF is building an automated checklist for reproducible fisheries assessments, one criterion at a time
rpymat
After three dormant years, rpymat returned to fix the OpenMP crash that breaks R and conda together
ieegio
ieegio's first release lands electrode trajectory burning and a WebGL-free surface plot
See all ibdsim2 alternatives → · See all reproducible alternatives →
Recent activity from ibdsim2 and reproducible
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 11d agoibdsim2profileSimIBD() sped up for dense marker panels; segment merging fixed
- 3mo agoreproducibleInode comparison fix for large-inode file systems
- 3mo agoreproducibleprepInputsCOG fetches only the spatial window from remote GeoTiffs
- 8mo agoibdsim2Segment-distribution merge argument, and function-valued parameters
- 1y agoibdsim2Built-in decode19 recombination map rebuilt, cutting 38k points to 14k
- 1y agoibdsim2Consistent IBD segment merging across the realised-coefficient functions
- 1y agoibdsim2Built-in pedigree labels revised; extra inbred examples added
- 1y agoibdsim2The Shiny front end moves into the package and gains X-chromosomal simulation ⚡
Frequently asked questions
What is the difference between ibdsim2 and reproducible?
They serve adjacent needs but don't currently overlap on shipped themes. ibdsim2 is currently shipping more aggressively (velocity 2.5 vs 0.0), with 0 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is ibdsim2 better than reproducible?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. ibdsim2 is currently shipping more aggressively (velocity 2.5 vs 0.0), with 0 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Analytics products to evaluate alongside.
What are the best alternatives to ibdsim2?
Top ibdsim2 alternatives in Analytics are ranked by recent ship velocity. Browse the "ibdsim2 alternatives" section above for the current picks, or visit /alternatives/ibdsim2 for the full list with editorial commentary on each.
What are the best alternatives to reproducible?
Top reproducible alternatives in Analytics are ranked by recent ship velocity. Browse the "reproducible alternatives" section above for the current picks, or visit /alternatives/reproducible for the full list with editorial commentary on each.