NEWS.md

In simsurv: Simulate Survival Data

simsurv 1.0.0 (9/1/2021)

New features

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

simsurv 0.2.5 (22/2/2019)

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 (6/2/2019)

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 (1/2/2019)

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 (18/5/2018)

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 (16/5/2018)

Bug fixes

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

simsurv 0.2.0 (6/3/2018)

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 (27/7/2017)

Initial CRAN release

NEWS Template

Version (Date)

Serious bug fixes

• List here if any

Bug fixes

• List here if any

New features

• List here if any

simsurv documentation built on Jan. 16, 2021, 5:27 p.m.