title: How to traverse two columns and fill in another column at the same index with a string in R?
body: <p>I have a data frame with a column of strings that are the question body of a survey, then I have a separate data frame with those question bodies matched two a question number. I want to traverse the original data frame's column and check if the value matches any within the other data frame and if does I want to store the associated question number in a column in the original df. I am having a lot of trouble figuring this out, I have looked into using apply() or something like that but I can't quite get it. Any help would be greatly appreciated.</p>