On Tue, 28 Oct 2008 18:04:57 -0700, Jeff Laake <[EMAIL PROTECTED]> wrote:
> Any insight into the behavior of "by" in the following case would be > appreciated. There is a note in the help details for "by" about > documenting behavior since v2.7 but I don't entirely understand what > it is saying. I'm using R2.7.2 Windows. I'm interested if the > following behavior was a change or whether it has always worked this > way. I looked at RSiteSearch and read through version changes but > found nothing. > Take a dataframe as follows: >> samples > Region.Label Area Sample.Label Effort Label 1 1 10000 1 100 11 2 1 > 10000 2 100 12 3 1 10000 3 100 13 4 1 10000 4 100 14 5 1 10000 5 100 > 15 6 1 10000 6 100 16 7 1 10000 7 100 17 8 1 10000 8 100 18 9 1 10000 > 9 100 19 10 1 10000 10 100 110 I cannot reproduce your results (please provide reproducible code), but: table(samples$Region.Label) is simpler for this purpose. -- Seb ______________________________________________ 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.
