I know one of R's advantages is it's ability to index, eliminating the need for control loops to select relevant data, so I thought this problem would be easy. I can't crack it. I have looked through past postings, but nothing seems to match this problem
I have a data set with one column of actors and one column of acts. I need a list that will give me a pair of actors in each row, provided they both participated in the act. Example: The Data looks like this: Jim A Bob A Bob C Larry D Alice C Tom F Tom D Tom A Alice B Nancy B I would like this: Jim Bob Jim Tom Bob Alice Larry Tom Alice Nancy The order doesn't matter (Jim-Bob vs. Bob-Jim), but each pairing should be counted only once. Thanks! -- View this message in context: http://n4.nabble.com/Using-indexing-to-manipulate-data-tp1597547p1597547.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.
