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Fix reversed argument order in renewaft(): the
signature was (SURVIVAL, prevtime, aft), inconsistent with
renewhr()/nhpphr()/nhppaft(),
causing generated renewal times to be computed with
prevtime and aft swapped and occasionally
precede the prior event.
Fix index overflow in s_piecewise() when only a
single finite break is supplied (e.g. breaks = c(1, Inf)),
which produced reversed index ranges and made the function fail with
“Unsucess scale”.
Fix s_gompertz() silently generating
NaN for a negative shape (decreasing hazard).
Draws that fall into the resulting cure fraction now correctly return
Inf instead of NaN. See the new “Negative
shape” documentation section for s_gompertz().
Fix numerical truncation to Inf in
s_lognormal()’s invCum_Hfx() and
Cum_Hfx() for large cumulative hazards / late times, caused
by probabilities underflowing to exactly 0 or 1 in double precision.
Both now use log.p/lower.tail forms of
qlnorm()/plnorm() to stay accurate.
Rename rsurvah()/ggplot_survival_ah()
to rsurveh()/ggplot_survival_eh(). These
generate the Extended Hazards model of Chen & Jewell (2001)
(h*(t) = hr * aft * h0(aft * t), nesting proportional
hazards and accelerated failure time as special cases), not the
Accelerated Hazards model of Chen & Wang (2000) as the previous name
implied. This is a breaking rename with no deprecated alias.
Improve documentation and vignettes
Fix graph after simulation to start in survival 1 at time 0 and cumulative risk 0 at time 0
Add logo
Addition of recurrent event simulation under homogeneous and non-homogeneous Poisson process
Addition of new distributions and new random generators functions
Add Log-Logistic distribution
Add Log-Normal distribution
Add generation of accelerated failure random times
Add generation of accelerated hazard times
Improve the cumulative hazard and inverse cumulative hazard function for the Exponential Piece wise distribution
Add function to graph random generated times under proportional hazard model, accelerated failure time models, and accelerated hazard model.
New vignette shows the generator of accelerated failure random times.
Submission to CRAN
Total refractory of the factories and functions.
function rsurvdf is defunct and replace by rsurvhr which is easier to use
lincomb function is not needed anymore and deleted
Inclusion of functions for censoring
Inclusion of graphs for comparison
Removal dependency on plyr
Inclusion of tests
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