problems formating scientific collaboration data
Hi, name of the data.frame is assumed to be dt. cnt.tmp <- strsplit(dt$Author, " ") cnt <- sapply(cnt.tmp, length) paper.cnt <- dt$Paper[cnt] author <- unlist(cnt.tmp) year <- dt$Year[cnt] dt.new <- data.frame(Paper = paper.cnt, Author = author, Year = year) HTH, Dong-hyun Oh
On Aug 27, 2008, at 9:27 PM, Grant Gillis wrote:
Hello all and thanks in advance for any help or direction. I have co-authorship data that looks like: Paper Author Year 1 SmithKK JonesSD 2008 2 WallaceAR DarwinCA 1999 3 HawkingS 2003 I would like: Paper Author Year 1 SmithKK 2008 1 JonesSD 2008 2 WallaceAR 1999 2 DarwinCA 1999 3 HawkingS 2003 Thanks for your patience with what is likely an easy question <r-help at r-project.org> [[alternative HTML version deleted]]
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