Nothing
# Sidik--Jonkman improved estimator for \eqn{\tau^2}
#
# Returns the Sidik--Jonkman improved estimator
# for \eqn{\tau^2} (Sidik & Jonkman, 2007).
#
# @name tau2h_sj2
# @rdname tau2h_sj2
# @param y the effect size estimates vector
# @param se the within studies standard errors vector
# @return
# \itemize{
# \item \code{tau2h}: the estimate for \eqn{\tau^2}.
# }
# @references
# Sidik, K., and Jonkman, J. N. (2007).
# A comparison of heterogeneity variance estimators
# in combining results of studies.
# \emph{Stat Med.}
# \strong{26}(9): 1964-1981.
# @examples
# data(sbp, package = "pimeta")
# pimeta::tau2h_sj2(sbp$y, sbp$sigmak)
# @export
tau2h_sj2 <- function(y, se) {
k <- length(y)
tau2h0 <- max(0.01, tau2h_vc(y, se)$tau2h)
w <- (1.0 + se^2/tau2h0)^-1
tau2h <- sum(w*(y - sum(y*w)/sum(w)))/(k - 1.0)
return(list(tau2h = tau2h))
}
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.