Maingo, See previous discussion below on rbind.na() and cbind.na() scripts:
https://stat.ethz.ch/pipermail/r-help/2016-December/443790.html You might consider binding first then adding orthogonally. So rbind.na() then colSums(), OR cbind.na() then rowSums(). Best of luck, W Michels, Ph.D. On Wed, Dec 13, 2017 at 8:34 AM, William Dunlap via R-help <r-help@r-project.org> wrote: > Without recycling you would get: > u <- c(10, 20, 30) > u + 1 > #[1] 11 20 30 > which would be pretty inconvenient. > > (Note that the recycling rule has to make a special case for when one > argument has length zero - the output then has length zero as well.) > > > Bill Dunlap > TIBCO Software > wdunlap tibco.com > > On Tue, Dec 12, 2017 at 9:41 PM, Maingo via R-help <r-help@r-project.org> > wrote: > >> I'm a newbie for R lang. And I recently came across the "Recycling Rule" >> when adding two vectors of unequal length. >> >> I learned from this tutor [ http://www.r-tutor.com/r- >> introduction/vector/vector-arithmetics ] that: >> >> """""" >> >> If two vectors are of unequal length, the shorter one will be recycled in >> order to match the longer vector. For example, the following vectors u and >> v have different lengths, and their sum is computed by recycling values of >> the shorter vector u. >> >> > u = c(10, 20, 30) >> >> > v = c(1, 2, 3, 4, 5, 6, 7, 8, 9) >> >> > u + v >> >> [1] 11 22 33 14 25 36 17 28 39 >> >> """""" >> >> And I wondered, why the shorter vecter u should be recycled? Why not just >> leave the extra values(4,5,6,7,8,9) in the longer vector untouched by >> default? >> >> Otherwise is it better to have another function that could add vectors >> without recycling? Right now the recycling feature bugs me a lot. >> >> Sent with [ProtonMail](https://protonmail.com) Secure Email. >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >> 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. >> > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
