Is this what you are after? http://www.statmethods.net/management/merging.html
-Roy On Dec 9, 2013, at 4:09 PM, Ross Boylan <r...@biostat.ucsf.edu> wrote: > Answering myself... > On Mon, 2013-12-09 at 15:59 -0800, Ross Boylan wrote: >> Can anyone recommend a good way to add tables? > For count data, which were my main concern, it looks as if tabulate with > nbins will work. I'm not sure how this works with a cross-classifying > factor, which I will also need. It's possible the factor may have > missing values in some tabulations as well. > > For the one dimensional case >> t1 <- tabulate(c(1, 2, 2, 4), nbins=5) >> t2 <- tabulate(c(2, 3, 5), nbins=5) >> t1 > [1] 1 2 0 1 0 >> t2 > [1] 0 1 1 0 1 >> t1+t2 > [1] 1 3 1 1 1 > >> Ideally I would like >> t1 <- table(x1) >> t2 <- table(x2) >> t1+t2 >> >> It t1 and t2 have the same levels this works fine, but I need something >> that will work even if they differ, e.g., >>> t1 >> >> 1 2 4 5 >> 2 1 1 1 >>> t2 <- table(c(10, 11, 12, 13)) >>> t1+t2 # apparently does simple vector addition >> >> 1 2 4 5 >> 3 2 2 2 >> whereas I want >> 1 2 4 5 10 11 12 13 >> 2 1 1 1 1 1 1 1 >> > > ______________________________________________ > 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. ********************** "The contents of this message do not reflect any position of the U.S. Government or NOAA." ********************** Roy Mendelssohn Supervisory Operations Research Analyst NOAA/NMFS Environmental Research Division Southwest Fisheries Science Center 1352 Lighthouse Avenue Pacific Grove, CA 93950-2097 e-mail: roy.mendelss...@noaa.gov (Note new e-mail address) voice: (831)-648-9029 fax: (831)-648-8440 www: http://www.pfeg.noaa.gov/ "Old age and treachery will overcome youth and skill." "From those who have been given much, much will be expected" "the arc of the moral universe is long, but it bends toward justice" -MLK Jr. ______________________________________________ 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.
