I have know how to sort and filter and group. can anyone answer my another question? Is there any function in R like *lead *and *lag * in SQL. They are relative position function. We can use them to solve problem such as : on year-on-year basis, link relative ratio
can anyone give a tips? -- View this message in context: http://r.789695.n4.nabble.com/plz-help-how-to-filter-group-sort-data-on-mass-data-tp4630714p4631653.html Sent from the R help mailing list archive at Nabble.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.
