On Mon, 2013-12-09 at 16:20 -0800, Roy Mendelssohn wrote: > Is this what you are after? > > http://www.statmethods.net/management/merging.html Not directly. Something could probably be fashioned using it and as.data.frame on the result of table(), but merge doesn't sum values.
Ross > > -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.
