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#'@title Function to perform multiplier bootstrap for changepoint
#'
#'@description This function simulates a random sample of Gaussian multipliers null hypothesis of a Gaussian HMM
#'and compute the Cramer-von Mises and Kolmogorov-Smirnov test statistics.
#'
#'@param MC n x n matrix = MM - C, with MM[i,j] = 1(Xi <= Xj) and C=mean(M[,j]);
#'@param n length of the series.
#
#'
#'@author Bouchra R Nasri and Bruno N Remillard, August 6, 2020
#'
#'@return \item{cvm}{simulated value of the Cramer-von Mises statistic}
#'@return \item{ks}{simulated value of the Kolmogorov-Smirnov statistic}
#'
#'@references Chapter 8 of B. Remillard (2013). Statistical Methods for Financial Engineering,
#'Chapman and Hall/CRC Financial Mathematics Series, Taylor & Francis.
#'
#'
#'@keywords internal
#'
#'@export
#'
multiplierfun <- function(MC,s,n){
xi <- rnorm(n)
out0 <- cpCopMultStats(MC,xi,s,n)
simKS <- max(out0$statT)
simCVM <- max(out0$statS)
out = list(cvm=simCVM,ks=simKS)
return(out)
}
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