partDSA 0.9.15

Bug fixes

• Bagged (“leafy”) partDSA no longer errors when leafy.random.num.variables.per.split is greater than or equal to the number of predictors; the random variable subset (“mtry”) is now capped at the number of predictors.

• trim() on a partDSA object now actually trims the inherited fields (IkPn, coefficients, IkPn.risks, var.importance). Previously the result of the inherited dsa trim method was discarded, so only the partDSA-specific fields were shortened.

• loss.function = "DR" for censored outcomes now fails with a clear message (it was never implemented and previously raised a cryptic “object ‘get.overall.risk’ not found”).

• Survival fits no longer print a spurious n == length(y)%/%2 is not TRUE error to the console. The internal per-partition outcome list relied on length(<Surv>) returning 2n; modern versions of the survival package return n, which silently disabled $datalist (and therefore dumpDSA() / showDSA() for survival outcomes). It now uses NROW().

• The Integrated Brier Score reported for multiple time points is now a proper, normalized score. Previously the per-time-point Brier scores were summed (default IBS.wt = rep(1, length(brier.vec))), inflating the reported value by roughly the number of time points and pushing it outside the valid [0, 0.25] range in both mean.cv.risk.DSA and test.set.risk.DSA. The default now uses trapezoidal weights that sum to 1 and normalize by the time range. Single-time-point behavior is unchanged; explicitly supplied IBS.wt is respected (and aligned to the now-sorted brier.vec).

Infrastructure / CRAN

• Migrated DESCRIPTION from the deprecated Author:/Maintainer: fields to Authors@R.
• Updated inst/CITATION from the old-style citEntry() / personList() to bibentry() / person().
• Renamed the internal helper split.fx() to find.split.fx() so it is no longer mistaken for an unregistered S3 method of the base split() generic.
• Added a testthat test suite (tests/testthat/).
• Vignettes: use the canonical CRAN package URL in the bibliography, and set a real \Address/\URL so the JSS link/to/webpage placeholder is no longer emitted into the PDFs. Removed a redundant data(GBSG2) call in the survival vignette.