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#'
#' Estimate the length of infection using the rearrengment and grenander estimator
#'
#' @title Estimate the length of infection
#'
#' @param loi Numeric vector containing the length of infections (LOI_PPS).
#'
#' @usage runif_bootstrap_rear_gren(loi)
#'
#' @return Estimated length of infection.
#'
#' @keywords internal
#' @noRd
runif_bootstrap_rear_gren = function(loi) {
loi = sample(loi, length(loi), replace = TRUE)
loi = c(calculate_I_smooth(data = data.frame(A.loi=loi),
method = "rear")$x.loi.hat,
calculate_I_smooth(data = data.frame(A.loi=loi),
method = "gren")$x.loi.hat)
loi = sort(loi)
loi = runif(1, loi[1], loi[2])
loi
}
#'
#' Estimate the length of infection using the mean
#'
#' @title Estimate the length of infection
#'
#' @param loi Numeric vector containing the length of infections (LOI_PPS).
#'
#' @usage bootstrap_mean(loi)
#'
#' @return Estimated length of infection.
#'
#' @keywords internal
#' @noRd
bootstrap_mean = function(loi) {
loi = mean(sample(loi, length(loi), replace = TRUE))
loi
}
#'
#' Estimate the length of infection using the mean
#'
#' @title Estimate the length of infection
#'
#' @param loi Numeric vector containing the length of infections (LOI_PPS).
#'
#' @usage bootstrap_mean_gren(loi)
#'
#' @return Estimated length of infection.
#'
#' @keywords internal
#' @noRd
bootstrap_mean_gren = function(loi) {
loi = sample(loi, length(loi), replace = TRUE)
loi = c(mean(loi),
calculate_I_smooth(data = data.frame(A.loi=loi),
method = "gren")$x.loi.hat)
n = length(loi)
a = 0.01
b = 500
alpha <- exp(a*(n-b))/(1+exp(a*(n-b)))
loi = sum(loi*c(1-alpha, alpha))
loi
}
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