I have a question similar to

I assume I will have to rewrite the previous code into a matching function, that only replaces if there is a match.

How should I match the labels with the new data frame if they exist?

CodePudding user response：

This is not super pretty, but you can use match to look up the variables that have labels and then only update those

matches <- match(names(df2), Lbl$Varcode) 
for (i in seq_along(matches)) {
  if (!is.na(matches[i]))
    label(df2[[i]]) <- Lbl$Variables[matches[i]]
}