Nothing
`inverse.gamma` <-
function(link="inverse"){
linktemp <- substitute(link)
if (!is.character(linktemp)) {
linktemp <- deparse(linktemp)
if (linktemp == "link") {
warning("use of inverse.gamma(link=link) is deprecated\n",
domain = NA)
linktemp <- eval(link)
if (!is.character(linktemp) || length(linktemp) !=
1)
stop("'link' is invalid", domain = NA)
}
}
okLinks <- c("inverse", "log", "identity")
if (linktemp %in% okLinks)
stats <- make.link(linktemp)
else if (is.character(link))
stats <- make.link(link)
else {
if (inherits(link, "link-glm")) {
stats <- link
if (!is.null(stats$name))
linktemp <- stats$name
}
else {
stop(gettextf("link \"%s\" not available for inverse-gamma family; available links are %s",
linktemp, paste(sQuote(okLinks), collapse = ", ")),
domain = NA)
}
}
variance<-function(arg1){
return(arg1^2)
}
dev.resids<-function(y, mu, wt) {
dev <- -2 * wt * (log( y/mu) - (y - mu)/mu)
return(dev)
}
structure(list(family = "inverse.gamma", link = linktemp, linkfun = stats$linkfun,
linkinv = stats$linkinv, variance = variance, dev.resids = dev.resids, mu.eta = stats$mu.eta),
class = "family")
}
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