On Thu, 2010-03-04 at 00:03 +0100, Randall Wrong wrote: > Thanks to all of you ! > > (Benjamin Nutter, Henrique Dallazuanna, Tobias Verbeke, Jorge Ivan > Velez, David Reinke and Gavin Simpson) > > > x <- c(1, 1, 1, NA, NA, 2, 1, NA) > > > table(x)["1"] > 1 > 4 > > Why do I get two numbers ?
It is a printing a named vector. The 1 is the "group" of factor level, the 4 is the "count", try: unname(table(x)[1]) and str(table(x)[1]) etc to see what is going on. HTH G > > Thanks, > Randall > > > > 2010/2/26 Nutter, Benjamin <nutt...@ccf.org> > 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 > > > only by the individual or entity to which it is addressed > and may contain information that is privileged, > confidential, and exempt from disclosure under applicable > law. If the reader of this message is not the intended > recipient or the employee or agent responsible for > delivering the message to the intended recipient, you are > hereby notified that any dissemination, distribution or > copying of this communication is strictly prohibited. If > you have received this communication in error, please > contact the sender immediately and destroy the material in > its entirety, whether electronic or hard copy. Thank you. > > > -- %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% Dr. Gavin Simpson [t] +44 (0)20 7679 0522 ECRC, UCL Geography, [f] +44 (0)20 7679 0565 Pearson Building, [e] gavin.simpsonATNOSPAMucl.ac.uk Gower Street, London [w] http://www.ucl.ac.uk/~ucfagls/ UK. WC1E 6BT. [w] http://www.freshwaters.org.uk %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% ______________________________________________ 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.
