Hello, I have a data frame, one element in that data frame is a LIST, with each element being a character string. I am trying to extract the first year listed in each of those character strings. The character elements are typically csv, but the position of the year can vary (think citations with varying citation standards). I.e.,
foo$a [[1]] [1] text, text, 2001, text [2] text, 2000, text [3] 1999, text, text, text, … I'm trying to figure out how to create a new list such that each element is that year, i.e., the result on the above would be: foo$year [[1]] [1] 2001 [2] 2000 [3] 1999 … For some reason i'm not figuring out how to properly get lapply and strsplit (or other alternatives) to play nicely together. Any help greatly appreciated. thanks, jimi jimi adams Assistant Professor Department of Sociology American University e: jad...@american.edu w: jimiadams.com ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
