Apologies if this is an obvious question but I am teaching myself R and the occasional push in the right direction is much appreciated?
I have a data.frame containing data that looks like this CustID itemID 1 a 1 b 2 c 3 a 3 c I want to assemble the vector of all the items bought by a particular customer and can't quite see how to do it. What is the best way to represent the answers for a single customer and by all customers? Thanks. -- View this message in context: http://www.nabble.com/How-do-I-construct-a-one-matrix-from-another--%28newbie%29-tp23913248p23913248.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.
