> This seems to work but is horribly slow (some files I am working with have > over 500,000 lines). Can anyone suggest a faster way of doing this, perhaps > a way that does not use a for loop? Thanks. If the table solutions don't work or take forever with your real data, have a look into the wiki: http://wiki.r-project.org/rwiki/doku.php?id=tips:data-frames:count_and_extract_unique_rows
Claudia -- Claudia Beleites Dipartimento dei Materiali e delle Risorse Naturali Università degli Studi di Trieste Via Alfonso Valerio 6/a I-34127 Trieste phone: +39 (0 40) 5 58-34 47 email: [EMAIL PROTECTED] ______________________________________________ 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.
