Nothing
confint.svabu <-
function (object, parm, level = 0.95, model = c("full", "sta", "det", "zif"), type, ...)
{
model <- match.arg(model)
if (!object$zeroinfl && model == "zif")
stop("not ZIF component found")
boot <- attr(object, "bootstrap")
if (missing(type)) {
type <- if (is.null(boot))
"cmle" else "boot"
}
type <- match.arg(type, c("cmle", "boot"))
# if (model == "zif" && type == "cmle" && is.null(object$phi.se))
# stop("bootstrap is required to provide values for 'phi'")
if (type == "boot" && is.null(boot))
stop("no bootstrap results found")
if (type != "boot")
boot <- NULL
cf <- coef(object, model)
# if (model == "full" && type == "cmle" && is.null(object$phi.se))
# cf <- cf[-length(cf)]
pnames <- names(cf)
if (missing(parm)) {
parm <- pnames
} else {
if (is.numeric(parm))
parm <- pnames[parm]
}
a <- (1 - level)/2
a <- c(a, 1 - a)
pct <- paste(format(100 * a, trim = TRUE, scientific = FALSE, digits = 3), "%", sep="")
ci <- array(NA, dim = c(length(parm), 2), dimnames = list(parm, pct))
if (type == "cmle") {
# fac <- qt(a, object$df.residual)
fac <- qnorm(a)
# if (model == "phi") {
# ses <- c(phi=object$phi.se)
# } else {
# ses <- sqrt(diag(vcov(object, model, type)))
# if (model=="full" && !is.null(object$phi.se))
# ses <- c(ses, phi=object$phi.se)
# }
ses <- sqrt(diag(vcov(object, model, type)))
ci[] <- cf[parm] + ses[parm] %o% fac
} else {
nps <- sapply(object$coefficients, length)
ip <- switch(model,
"full" = 1:sum(nps),
"sta" = 1:nps[1],
"det" = (nps[1] + 1):(nps[1] + nps[2]),
"zif" = (nps[1] + nps[2] + 1):sum(nps))
cii <- t(apply(matrix(boot[ip, ], nrow=length(ip)), 1, quantile, probs=a))
rownames(cii) <- pnames
ci[] <- cii[parm,,drop=FALSE]
}
return(ci)
}
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