Nothing
#' @method survfit cyclopsFit
#' @title Calculate baseline hazard function
#'
#' @description
#' \code{survfit.cyclopsFit} computes baseline hazard function
#'
#' @param formula A Cyclops survival model fit object
#' @param type type of baseline survival, choices are: "aalen" (Breslow)
#' @param ... for future methods
#'
#' @return Baseline survival function for mean covariates
#'
#' @importFrom survival survfit
#'
#' @export
survfit.cyclopsFit <- function(formula, type="aalen", ...) {
cyclopsFit <- formula
delta = meanLinearPredictor(cyclopsFit)
times = getTimeVector(cyclopsFit$cyclopsData)
events = getYVector(cyclopsFit$cyclopsData)
predictors = exp(predict(cyclopsFit))
if (type == "aalen") {
accDenom = Reduce("+",predictors,accumulate=TRUE)
newAccDenom = accDenom[length(times)+1-match(unique(times),times[length(times):1])]
newTimes = unique(times)
n = length(newTimes)
t = table(times*events)[-1]
g = match(as.numeric(names(t)), newTimes)
newY = rep(0,n)
newY[g] = t
l = newY/newAccDenom
L = rep(0,n)
for (i in 1:n) {
L[n+1-i] = sum(l[i:n])
}
return (list(time = newTimes[order(newTimes)],
surv = 1/exp(L)^exp(delta)))
}
}
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.