Nothing
poisson.blaker.upper.limit <- function(x,level,tol=1e-10,maxiter=100) {
alpha <- 1-level
# Clopper-Pearson limit (CPL)
upper <- qgamma(1-alpha/2,x+1,1)
p1 <- ppois(x,upper,lower.tail=TRUE)
q1.cp <- qpois(1-p1,upper)+1
lower <- x
iter <- 0
while (upper-lower >= tol) {
iter <- iter+1
if (iter > maxiter) {
warning("Tolerance limit of ",tol,
" not attained after ",maxiter,
" iterations for x = ",x)
break
}
mid <- (lower+upper)/2
p1 <- ppois(x,mid,lower.tail=TRUE)
# Blaker's limit is below the midpoint if either
# (i) acceptability at mid > alpha (NEW!! orig: >=), or
# (ii) acceptability function has a discontinuity between
# the midpoint and CPL (first test).
if (p1 >= ppois(q1.cp-2,mid,lower.tail=FALSE) || p1 + ppois(q1.cp-1,mid,lower.tail=FALSE) > alpha) {
lower <- mid
}
else {
upper <- mid
}
}
return(upper)
}
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