But if x has any missing values: > x <- c(1, 1, 1, NA, NA, 2, 1, NA) > > sum( x == 1) [1] NA > > sum(x==1, na.rm=TRUE) [1] 4
-----Original Message----- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Henrique Dallazuanna Sent: Friday, February 26, 2010 9:47 AM To: Randall Wrong Cc: r-help@r-project.org Subject: Re: [R] counting the number of ones in a vector Try: sum(x == 1) On Fri, Feb 26, 2010 at 11:40 AM, Randall Wrong <randall.wr...@gmail.com> wrote: > Dear R users, > > I want to count the number of ones in a vector x. > > That's what I did : length( x[x==1] ) > > Is that a good solution ? > Thank you very much, > Randall > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O ______________________________________________ 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. =================================== P Please consider the environment before printing this e-mail Cleveland Clinic is ranked one of the top hospitals in America by U.S.News & World Report (2009). Visit us online at http://www.clevelandclinic.org for a complete listing of our services, staff and locations. Confidentiality Note: This message is intended for use\...{{dropped:13}} ______________________________________________ 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.
