> -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On > Behalf Of sjaffe > Sent: Thursday, March 04, 2010 10:59 AM > To: r-help@r-project.org > Subject: Re: [R] counting the number of ones in a vector > > > I got tired of writing length(which()) so I define a useful function which I > source in my .Rprofile: > > count <- function( x ) length(which(x)) > > Then: > > count( x == 1 ) >
How about sum(x==1) ? No need to write a new function, and it is even 2 characters less to type. Hope this is helpful, Dan Daniel J. Nordlund Washington State Department of Social and Health Services Planning, Performance, and Accountability Research and Data Analysis Division Olympia, WA 98504-5204 ______________________________________________ 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.
