如何在 r 中为 data.frame(NULL) 分配名称？

Question

I was trying to give a null data frame a name,

    word_list = NULL
    corpusfreq <- data.frame(word_list)
    names(corpusfreq) <- c("Word")

but R keeps giving me the error that

"Error in names(corpusfreq) <- c("Word") : 
  'names' attribute [1] must be the same length as the vector [0]"

I have looked at several similar questions but none of them addressed my question.

Thanks.

Answer 1

The names() command as applied to data frames returns names of the columns of the data frame, and your data frame is null and has no columns, and therefore cannot have column names. What are you trying to end up with? Your data frame has a name: Corpusfreq.

corpusfreq <- data.frame("Word" = NA)

Will give you not a Null data frame, but a data frame with a single column, "Word", that has one row, and that row has an NA. Maybe that's what you want?