Nothing
changeFunctions <- function(expr, old, new) {
if(is.recursive(expr)) {
i <- match(as.character(expr[[1]]), old)
if(!is.na(i))
expr[[1]] <- as.name(new[[i]])
n <- length(expr)
if(n > 1) for(i in 2:n)
expr[[i]] <- Recall(expr[[i]], old, new)
}
expr
}
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