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Comparison · Infra & APIs
logbin vs RSA
A side-by-side editorial comparison of logbin and RSA — release velocity, themes, recent moves, and the top alternatives to consider.
logbin vs RSA: at a glance
What is logbin?
Relative-risk regression that converges where glm fails, under an unreadable tag order
logbin fits log-binomial models to estimate relative risk, a fit standard glm frequently fails to converge on because of the constrained parameter space. Its answer is a choice of algorithms — adaptive barrier, combinatorial EM, and expectation-maximisation on an overparameterised model — selected through a method argument and optionally accelerated with turboEM. The most recent release, in April 2025, replaces the variance-covariance calculation in summary.logbin so it matches summary.glm, and adds a testthat suite.
What is RSA?
Four years quiet, then two releases ninety seconds apart, both about drawing better plots
RSA implements response surface analysis for congruence questions in psychology, built on lavaan. After four and a half years of silence the maintainer pushed 0.10.6 and 0.10.8 within ninety seconds of each other on 2 October 2025, so the feed's version sequence is a backfill of accumulated work rather than two separate release events. Both are plotting releases: user-defined lines and points on the surface, stilts for selected data points, and separate control of point fill and border colour.
logbin vs RSA: editorial side-by-side
logbin
0.0INFRA · APIS
Relative-risk regression that converges where glm fails, under an unreadable tag order
◆ Current state
logbin fits log-binomial models to estimate relative risk, a fit standard glm frequently fails to converge on because of the constrained parameter space. Its answer is a choice of algorithms — adaptive barrier, combinatorial EM, and expectation-maximisation on an overparameterised model — selected through a method argument and optionally accelerated with turboEM. The most recent release, in April 2025, replaces the variance-covariance calculation in summary.logbin so it matches summary.glm, and adds a testthat suite.
◆ Where it's heading
The method work concluded in 2021 and the package has since been aligned with base R conventions rather than extended: the vcov calculation now mirrors glm's, and earlier releases added the contrasts, qr, R and effects components so standard glm S3 methods such as influence() and plot() work on logbin objects. Be warned that the feed's tag order is unusable — versions 2.0, 2.0.1, 2.0.2 and 2.0.4 were all pushed within ninety seconds on 23 July 2021 in non-monotonic order, while 2.0.3 carries a 2017 timestamp and restates 2.0.2's notes. Read the bodies, not the sequence.
◆ Prediction
Expect continued alignment with glm conventions and occasional CRAN maintenance; the algorithm set has been stable for four years and nothing in these entries suggests another is planned.
RSA
0.0INFRA · APIS
Four years quiet, then two releases ninety seconds apart, both about drawing better plots
◆ Current state
RSA implements response surface analysis for congruence questions in psychology, built on lavaan. After four and a half years of silence the maintainer pushed 0.10.6 and 0.10.8 within ninety seconds of each other on 2 October 2025, so the feed's version sequence is a backfill of accumulated work rather than two separate release events. Both are plotting releases: user-defined lines and points on the surface, stilts for selected data points, and separate control of point fill and border colour.
◆ Where it's heading
The statistical core has been stable since 0.10.0 in 2020, which added control variables, pooled centering and a corrected AICc. Everything since is either plot customisation or a reaction to a dependency — lavaan model comparison, rgl deprecations, tkrplot on Apple Silicon, the ggplot2 fill aesthetic. This is a mature method implementation in maintenance, where the visible work is making its surface plots publishable.
◆ Prediction
Further releases are most likely dependency reactions, with rgl and ggplot2 the two that have repeatedly forced changes, and plot customisation arriving in batches whenever the maintainer returns to the package.
Alternatives to logbin and RSA
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 logbin or RSA.
Cursor
Cursor's agents stop waiting to be asked - they subscribe, and they hold a goal until it's done.
incident.io
Nexus does the diagnosis; the agent is now reaching into the status page too.
Warp
Warp turned its quarter of software-factory essays into infrastructure you can buy.
Okta
Okta's developer blog is a Cross App Access campaign, now diluted by advocacy-team storytelling.
tealeaves
A leaf-temperature model that finished its job in 2020 and has stayed finished
Recent activity from logbin and RSA
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 10mo agoRSAUser-defined lines and points on response surface plots
- 10mo agoRSAStilts and separate point fill and border colours in plotRSA
- 1y agologbinvcov in summary.logbin now matches summary.glm
- 5y agologbinFactor reparameterisation fix and faster parameter expansion
- 5y agologbinVersion bump to satisfy a CRAN check
- 5y agologbinmethod and accelerate options: adaptive barrier, CEM, EM, turboEM
- 5y agologbinglm S3 method support via contrasts, qr, R and effects components
- 5y agologbinJournal of Statistical Software citation added
- 5y agoRSADemo dataset for control variables and cubic RSA; SRSQD fix
- 5y agoRSAtkrplot moved to Suggests for Apple Silicon
- 6y agoRSAFixes for R 4.0.0 stringsAsFactors and discrepancy output
- 6y agoRSAControl variables, pooled centering and a corrected AICc
Frequently asked questions
What is the difference between logbin and RSA?
They serve adjacent needs but don't currently overlap on shipped themes. logbin and RSA 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 logbin better than RSA?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. logbin and RSA 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 logbin?
Top logbin alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "logbin alternatives" section above for the current picks, or visit /alternatives/logbin for the full list with editorial commentary on each.
What are the best alternatives to RSA?
Top RSA alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "RSA alternatives" section above for the current picks, or visit /alternatives/rsa for the full list with editorial commentary on each.