Nothing
updFormula <- function(model, var) {
var <- as.character(substitute(var))
tnames <- colnames(attr(terms(model), "factors"))
hasVar <- grep(paste(":",var,":", sep = ""),
paste(":", tnames, ":", sep=""), fixed = TRUE)
fText <- paste("~ .", paste("-", tnames[hasVar], collapse = " "))
eval(parse(text = fText)[[1]])
}
setGeneric("updFormula", signature = "model")
setMethod(updFormula, "formula", function(model, var) {
eval(parse(text = paste("~ . -", as.character(var))))
})
setGenericImplicit("updFormula")
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