Ah, yes, of course. tabulate(x, 1) doesn't work, too, in R 3.4.0. Sorry, I didn't actually try.
I thought of an alternative when TRUE count is 2^31 or more. sum(x) returns NA with a warning. sum(as.numeric(x)) works, but requires a quite large memory. -------------------------------------------- On Thu, 8/6/17, Bert Gunter <bgunter.4...@gmail.com> wrote: Subject: Re: [R] Another way to count TRUE Cc: "R-help" <r-help@r-project.org> Date: Thursday, 8 June, 2017, 1:09 AM Bad idea! In R3.3.3 it doesn't even work: > y1 <- tabulate(x,1) Error in tabulate(x, 1) : 'bin' must be numeric or a factor ## This does: > y1 <- tabulate(as.integer(x),1) But it's more inefficient than just using sum(), even discounting the as.integer() conversion: > y1 <- tabulate(as.integer(x),1) > y2 <- sum(x) > identical(y1,y2) [1] TRUE > xx <- as.integer(x) > system.time(replicate(12,tabulate(xx,1))) user system elapsed 2.488 0.003 2.491 > system.time(replicate(12,sum(x))) user system elapsed 0.626 0.001 0.627 Were you simply unaware of sum() or was there some other reason for your recommendation? Cheers, Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Wed, Jun 7, 2017 at 9:33 AM, Suharto Anggono Suharto Anggono via R-help <r-help@r-project.org> wrote: > To get the number of TRUE in logical vector 'x', > tabulate(x, 1) > can be used. Actually, it gives count of 1, but TRUE as integer is 1. Since R 3.4.0, it gives a correct answer, too, when the count is 2^31 or more. > > ______________________________________________ > 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.
