simsurv 1.0.0 (9/1/2021)

New features

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

simsurv 0.2.3 (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.

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