glymotif
A glycan motif matcher trading convenience wrappers for speed, strictness and explicit specs.
Comparison · Analytics
ibdsim2 vs vellumverse
A side-by-side editorial comparison of ibdsim2 and vellumverse — release velocity, themes, recent moves, and the top alternatives to consider.
ibdsim2 vs vellumverse: 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 vellumverse?
A meta-package whose entire changelog is a version pin, tracking an ecosystem moving faster than it is.
vellumverse attaches the vellum graphics ecosystem in one library() call, reports which versions loaded, lists the bundled packages and surfaces functions masked across them. It is deliberately dependency-light, having dropped rlang and declared only what the conflict reporter actually uses. Since 0.2.0 every release has been a version pin bump rather than new behaviour of its own.
ibdsim2 vs vellumverse: 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.
vellumverse
5.0ANALYTICS
A meta-package whose entire changelog is a version pin, tracking an ecosystem moving faster than it is.
◆ Current state
vellumverse attaches the vellum graphics ecosystem in one library() call, reports which versions loaded, lists the bundled packages and surfaces functions masked across them. It is deliberately dependency-light, having dropped rlang and declared only what the conflict reporter actually uses. Since 0.2.0 every release has been a version pin bump rather than new behaviour of its own.
◆ Where it's heading
The release record is an index of other packages' work: four of the last six entries do nothing but raise the floor on vellum, vellumplot and vellumwidget. The cadence tells the real story, with pins moving roughly weekly and each bump chasing a minor release somewhere downstream, so the meta-package is currently a distribution convenience rather than a component. The one genuinely structural release in the window was 0.2.1, which trimmed the dependency surface to keep an attach-only package cheap to install.
◆ Prediction
Expect the pin bumps to keep pace with the ecosystem's weekly releases rather than any feature of its own, and the pin on vellumplot to move again as the interaction grammar the widget now depends on continues to land. Whether vellumverse ever grows beyond attach-and-report is not visible in these entries.
Alternatives to ibdsim2 and vellumverse
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 vellumverse.
glyrepr
The type system the rest of the glycan stack is built on, being hardened one breaking change at a time.
glyanno
Glycan annotation stops depending on the database having seen the structure before.
glydraw
SNFG glycan cartoons stopped being pictures and became ggplot2 geoms, guides and axis labels.
glyenzy
Glycan biosynthesis as a traceable enzyme graph, now including sulfation and gaps it can bridge.
KLINK
Forensic kinship testing with linked STR markers, now peer-reviewed and taking data from anywhere.
See all ibdsim2 alternatives → · See all vellumverse alternatives →
Recent activity from ibdsim2 and vellumverse
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 11d agoibdsim2profileSimIBD() sped up for dense marker panels; segment merging fixed
- 14d agovellumversePins raised to vellum 0.6.6, vellumplot 0.9.0, vellumwidget 0.8.0
- 20d agovellumversePins raised to vellumplot 0.8.0 and vellumwidget 0.7.0
- 27d agovellumversePins raised to vellum 0.5.0, vellumplot 0.6.0, vellumwidget 0.6.0
- 1mo agovellumversePins raised to vellum 0.4.0, vellumplot 0.5.0, vellumwidget 0.5.0
- 1mo agovellumverseDependency surface trimmed to keep the meta-package light
- 1mo agovellumverseAdopts vellum's renamed vl_* graphics primitives
- 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 vellumverse?
They serve adjacent needs but don't currently overlap on shipped themes. vellumverse is currently shipping more aggressively (velocity 5.0 vs 2.5), 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 vellumverse?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. vellumverse is currently shipping more aggressively (velocity 5.0 vs 2.5), 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 vellumverse?
Top vellumverse alternatives in Analytics are ranked by recent ship velocity. Browse the "vellumverse alternatives" section above for the current picks, or visit /alternatives/vellumverse for the full list with editorial commentary on each.