humind
The MSNI humanitarian needs framework as code, rewritten and re-broken every year
Comparison · Infra & APIs
radiatR vs slendr
A side-by-side editorial comparison of radiatR and slendr — release velocity, themes, recent moves, and the top alternatives to consider.
radiatR vs slendr: at a glance
What is radiatR?
A circular-statistics toolkit for animal movement, shipped and then tightened in three weeks.
radiatR reads movement trajectories, plots them on circular axes, computes kinematics such as speed and path sinuosity, and runs the circular statistics that go with them, including tests of mean direction, symmetry and unimodality. It arrived as a first public release on 9 July 2026 with an accompanying Shiny app, and has had two releases since at roughly weekly intervals. The 0.1.x line is still setting its boundaries: 0.1.2 removes a loader dialect and makes previously silent data problems into errors.
What is slendr?
Population-genetic simulation in R, opened up to selection and finally easier to install.
slendr specifies spatial and non-spatial population-genetic models in R and simulates them through SLiM or msprime, returning tree sequences that tskit then analyses. Two threads dominate the current releases: keeping in step with fast-moving backends, with SLiM 5.1, pyslim 1.1.0 and Python 3.13 now required, and reducing the setup burden that its Python dependency imposes. Version 1.5.0 adds ephemeral uv-based virtual environments, so init_env(uv = TRUE) can stand in for creating a permanent environment with setup_env().
radiatR vs slendr: editorial side-by-side
radiatR
2.5INFRA · APIS
A circular-statistics toolkit for animal movement, shipped and then tightened in three weeks.
◆ Current state
radiatR reads movement trajectories, plots them on circular axes, computes kinematics such as speed and path sinuosity, and runs the circular statistics that go with them, including tests of mean direction, symmetry and unimodality. It arrived as a first public release on 9 July 2026 with an accompanying Shiny app, and has had two releases since at roughly weekly intervals. The 0.1.x line is still setting its boundaries: 0.1.2 removes a loader dialect and makes previously silent data problems into errors.
◆ Where it's heading
Three releases in twelve days show a package hardening in public rather than accreting features. The direction of travel is toward refusing bad input instead of quietly working around it: non-finite coordinate rows now error by default rather than being dropped silently, combining Tracks objects rejects colliding trajectory ids and conflicting calibration metadata instead of merging them and discarding one side, and the Shiny app clears prior state before reading a new upload. The statistical surface is growing in parallel, but within the scope the first release already claimed.
◆ Prediction
Expect the remaining goodness-of-fit gap the notes name explicitly, Jones-Pewsey, to be filled in a later release, and the error-on-bad-input treatment to reach the parts of the loader it has not yet covered. A CRAN submission is the natural next step for a package this young, though nothing in these entries commits to one.
slendr
0.0INFRA · APIS
Population-genetic simulation in R, opened up to selection and finally easier to install.
◆ Current state
slendr specifies spatial and non-spatial population-genetic models in R and simulates them through SLiM or msprime, returning tree sequences that tskit then analyses. Two threads dominate the current releases: keeping in step with fast-moving backends, with SLiM 5.1, pyslim 1.1.0 and Python 3.13 now required, and reducing the setup burden that its Python dependency imposes. Version 1.5.0 adds ephemeral uv-based virtual environments, so init_env(uv = TRUE) can stand in for creating a permanent environment with setup_env().
◆ Where it's heading
Since the 1.0.0 release added non-neutral simulation, the work has shifted from capability to friction. A large share of recent notes concerns Python environment handling, conda activation races on Windows, dependency pruning that made shiny optional, and argument names that misled users, as when gene_flow()'s rate argument turned out to mean total ancestry proportion rather than a rate. That is the profile of a package whose scientific surface is settled and whose remaining problems are the ones users actually hit.
◆ Prediction
Expect the uv-based environment path to move from fallback to default once it has proven itself, given the notes already describe an environment variable for making it so. The deprecated rate argument in gene_flow() is explicitly slated for removal in a future major release, which is the clearest signal here of what a 2.0 would contain.
Alternatives to radiatR and slendr
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 radiatR or slendr.
inlabru
A Bayesian spatial modelling package rebuilding its foundations one breaking release at a time
afcharts
UK government chart styling in ggplot2, chasing ggplot2 v4 and stretching its palette to five.
coga
A gamma-convolution density package that reached completion in 2018 and has coasted since.
smam
Animal-movement models in R, where new stochastic processes arrive years apart.
baseq
A basic DNA and RNA sequence toolkit that went quiet for three years, then jumped to 2.0.
See all radiatR alternatives → · See all slendr alternatives →
Recent activity from radiatR and slendr
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 29d agoradiatRctrax loader dropped; bad coordinates now error by default
- 1mo agoradiatRWrapped-Cauchy and Pycke tests close two statistical gaps
- 1mo agoradiatRFirst public release ⚡
- 1mo agoslendrEphemeral uv Python environments remove the setup step
- 7mo agoslendrgene_flow() separates migration rate from ancestry proportion
- 9mo agoslendrshiny made optional; SLiM 5.1 and Python 3.13 required
- 1y agoslendrconda activation reverted to a slower but reliable path
- 1y agoslendrBackends raised to SLiM 5.0, tskit 0.6.4 and msprime 1.3.4
- 1y agoslendrNon-neutral models arrive; slim() interface simplified ⚡
Frequently asked questions
What is the difference between radiatR and slendr?
They serve adjacent needs but don't currently overlap on shipped themes. radiatR 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 radiatR better than slendr?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. radiatR 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 Infra & APIs products to evaluate alongside.
What are the best alternatives to radiatR?
Top radiatR alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "radiatR alternatives" section above for the current picks, or visit /alternatives/radiatr for the full list with editorial commentary on each.
What are the best alternatives to slendr?
Top slendr alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "slendr alternatives" section above for the current picks, or visit /alternatives/slendr for the full list with editorial commentary on each.