simsurv 1.0.1.9000

New features

• Current development version

simsurv 1.0.1 (2026-01-21)

Bug fixes

• Fixed NEWS.md format to comply with CRAN requirements (ISO 8601 dates and proper heading levels)

simsurv 1.0.0 (2021-01-09)

New features

• Version number bumped to 1.0.0 to correspond to publication of JSS paper.

simsurv 0.2.5 (2019-02-22)

Bug fixes

• Fix bug where infinite survival time were incorrectly returned as NaN (due to: Inf * d = NaN when d = 0 is for a censored individual)

simsurv 0.2.4 (2019-02-06)

New features

• Allow negative shape parameters for the Gompertz distribution (note that this can lead to infinite survival times, in which case the survival time is set to ‘Inf’ and a warning is printed).

Bug fixes

• The simsurv() function documentation and the technical vignette have been updated to better clarify the parameterisations for the parametric distributions.

simsurv 0.2.3 (2019-02-01)

New features

• The rootfun argument has been added. This allows the user to apply any transformation to each side of the root finding equation. The default is rootfun = log which corresponds to uniroot solving -H(t) - log(u) = 0.
• The rootsolver argument has been added. This allows the user to choose between stats::uniroot or BB::dfsane for the root finding.

simsurv 0.2.2 (2018-05-18)

New features

• The uniroot function (called internally by simsurv) now solves - H(t) - log(u) = 0 instead of exp(-H(t)) - u = 0, i.e. it is on log scale.

simsurv 0.2.1 (2018-05-16)

Bug fixes

• The interval argument of simsurv supports a lower limit of zero (thanks to Alessandro Gasparini, @ellessenne).

simsurv 0.2.0 (2018-03-06)

New features

• Added technical and example usage vignettes
• Added user-specified cumulative hazard or log cumulative hazard
• Added analytical forms for the inverted survival function when generating survival times from standard distributions (instead of using numerical root finding). This has lead to about a 5-fold increase in speed when simulating event times from standard parametric distributions.

simsurv 0.1.0 (2017-07-27)

Initial CRAN release