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Comparison · Infra & APIs
rgm vs RNiftyReg
A side-by-side editorial comparison of rgm and RNiftyReg — release velocity, themes, recent moves, and the top alternatives to consider.
rgm vs RNiftyReg: at a glance
What is rgm?
A microbiome network model that got itself un-archived by deleting the dependency that killed it.
rgm implements the random graphical model for microbiome interactions across related environments, published in JABES in 2026. The package was archived from CRAN in February 2026 because of its dependency on huge; the recovery release drops that dependency entirely, which cost it the graphical-lasso warm start that used to seed the initial graph — the default is now an empty graph, with warm starts left to the user. A post-processing function returning ggplot diagnostics arrived in the same release.
What is RNiftyReg?
Medical image registration, maintained with unusual care for other people's conventions.
RNiftyReg wraps the NiftyReg C++ library for linear and non-linear registration of medical images in R. The releases in the window are all corrections rather than features: a serialisation bug in saveTransform(), a C++20 comparison warning, and a removed class member flagged by a compiler pre-release. The substantive item is 2.8.4, which fixed an image-flip bug when importing FSL-FLIRT transforms.
rgm vs RNiftyReg: editorial side-by-side
rgm
0.0INFRA · APIS
A microbiome network model that got itself un-archived by deleting the dependency that killed it.
◆ Current state
rgm implements the random graphical model for microbiome interactions across related environments, published in JABES in 2026. The package was archived from CRAN in February 2026 because of its dependency on huge; the recovery release drops that dependency entirely, which cost it the graphical-lasso warm start that used to seed the initial graph — the default is now an empty graph, with warm starts left to the user. A post-processing function returning ggplot diagnostics arrived in the same release.
◆ Where it's heading
Three tags shipped inside two hours on one day, and the notes are candid about why: 1.1.0 held the actual work but was never released, 1.2.0 restated it under a higher version to signal the size of the change, and 1.2.1 answered CRAN pre-test feedback. Beyond the archival recovery, the visible work is housekeeping that had accumulated — a shadowed rmvnorm() definition, roxygen import tags that were silently emitting nothing, leftover C++ template scaffolding, and build artifacts under version control. The diagnostics function is the only genuinely new user-facing capability in the window.
◆ Prediction
The immediate task was restoring availability, and that is done; the open question the entries raise is whether losing the graphical-lasso warm start affects convergence in practice, which the new diagnostic plots are positioned to answer.
RNiftyReg
0.0INFRA · APIS
Medical image registration, maintained with unusual care for other people's conventions.
◆ Current state
RNiftyReg wraps the NiftyReg C++ library for linear and non-linear registration of medical images in R. The releases in the window are all corrections rather than features: a serialisation bug in saveTransform(), a C++20 comparison warning, and a removed class member flagged by a compiler pre-release. The substantive item is 2.8.4, which fixed an image-flip bug when importing FSL-FLIRT transforms.
◆ Where it's heading
The package is stable and the maintenance work is characteristically about interoperability, correctly interpreting transforms written by other toolchains and staying clean against evolving C++ standards and compilers. The FLIRT flip fix is the clearest example: it required knowing an undocumented quirk of how another tool handles images with positive-determinant xforms. Several fixes originate from CRAN's compiler checks, and 2.8.5 finally retired a README section about upgrading from a release line now over ten years old.
◆ Prediction
Expect continued small releases tracking compiler and standards changes, with feature work arriving only if the underlying NiftyReg library moves.
Alternatives to rgm and RNiftyReg
Other Infra & APIs 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 rgm or RNiftyReg.
WPML
WPML made machine translation the default, and its point releases keep chasing WordPress and page builders.
forestploter
A forest plot package that keeps handing users control of one more graphical detail.
ggInterval
Interval-valued data plotting, spending 2026 making its function names and examples survive CRAN.
contagionchannels
Three releases in ten days, every one of them a CRAN reviewer's correction rather than a code change.
tidyaudit
Pipeline provenance for tidyverse workflows, recording what changed at each step without keeping the data.
See all rgm alternatives → · See all RNiftyReg alternatives →
Recent activity from rgm and RNiftyReg
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 3mo agorgmJournal DOI replaces the preprint; promotional wording removed
- 3mo agorgmBack on CRAN after dropping the dependency that caused archival
- 3mo agorgmUnreleased twin of the CRAN recovery release
- 5mo agoRNiftyRegsaveTransform() returns the serialised object instead of erroring
- 1y agoRNiftyRegFSL-FLIRT transform import no longer flips images
- 2y agoRNiftyRegRemoved a class method referencing a nonexistent data member
- 2y agoRNiftyRegasAffine() convenience method added for niftyregRDS objects
- 2y agorgmFirst release: simulation, estimation and post-processing
Frequently asked questions
What is the difference between rgm and RNiftyReg?
They serve adjacent needs but don't currently overlap on shipped themes. rgm and RNiftyReg 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 rgm better than RNiftyReg?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. rgm and RNiftyReg 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 Infra & APIs products to evaluate alongside.
What are the best alternatives to rgm?
Top rgm alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "rgm alternatives" section above for the current picks, or visit /alternatives/rgm for the full list with editorial commentary on each.
What are the best alternatives to RNiftyReg?
Top RNiftyReg alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "RNiftyReg alternatives" section above for the current picks, or visit /alternatives/rniftyreg for the full list with editorial commentary on each.