Thank you Gavin and Bert 2010/3/4 Gavin Simpson <gavin.simp...@ucl.ac.uk>
> 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<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<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<http://gavin.simpsonatnospamucl.ac.uk/> > Gower Street, London [w] http://www.ucl.ac.uk/~ucfagls/ > UK. WC1E 6BT. [w] http://www.freshwaters.org.uk > %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% > > [[alternative HTML version deleted]]
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