Thanks for your reply Note that I guess that there are many providerID and I get the error cannot allocate vector of size 2.1 Gb (I can use the same trick for most of the other fields)
Is there a way to do the same only for providerID with relatively high frequency? -- View this message in context: http://r.789695.n4.nabble.com/How-to-build-a-matrix-of-number-of-appearance-tp3643248p3645550.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.
