## The function is currently defined as
function(sigma, x, y, distr = 1, asigma = 1, bsigma = 2, delta = 4) {
sigmaStar <- rgamma(1, shape = delta, rate = delta / sigma)
sigmaT <- sigma
qgammas <- sigmaT / sigmaStar
Qgammas <- sigmaStar / sigmaT
Term2 <- qgammas^(2 * delta - 1) * exp(-delta * (qgammas -
Qgammas))
Kgamma <- Qgammas^(asigma - 1) * exp(-bsigma * (sigmaStar -
sigmaT))
Prod <- 1
for (i in seq(length(x))) {
Prod <- Prod * (dk(x[i], distr = distr, mu = y[i], sigma = sigmaStar) / dk(x[i],
distr = distr, mu = y[i], sigma = sigmaT
))
}
q3 <- min(1, Kgamma * Prod * Term2)
sigma <- ifelse(runif(1) <= q3, sigmaStar, sigmaT)
return(sigma)
}
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