R/dCFBio.R

In ComRiskModel: Fitting of Complementary Risk Models

#' @export
dCFBio<-function (x, a, b, m, lambda, log = FALSE)
{
G=(1-((1+(x/a)^b))^(-1))
g=((1+(x/a)^b))^(-2) *b*x^(b-1)*a^(-b)


  pdf <- x
  pdf[log == FALSE] <-(lambda*g*m*(1-lambda*(1-G))^(m-1))/(1-(1-lambda)^(m))
  pdf[log == TRUE] <-log(lambda)+log(m)+log(g)+(m-1)*log(1-lambda*(1-G))-log(1-(1-lambda)^(m))
  return(pdf)
}