How to change factor labels into string in a data frame

Question

I have the following data frame:

    name1  name2
        A      B
        B      D
        C      C
        D      A

the columns \"name1\"

Answer 1

If you want to convert only the selected column of factor variable instead of all the factor variable columns in the data frame, you can use:

file1[,n] <- sapply(file1[,n], as.character)

where n is the column number.