Dear all, Thank you for the prompt responses. It is until today that I have managed to scrap together the time to develop my R-project further. In my free time, I have been reading various intro manuals, so I have a rough idea of what needs doing. Sometimes, though, putting it into practice is more troublesome than it looks. It is fascinating how pliable this programming language is. I will report on my progress as soon as I can.
Sincerely, Michael Hopgood. -- View this message in context: http://r.789695.n4.nabble.com/Extraction-and-replacement-of-data-in-a-data-frame-tp3221261p3229476.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.