Here is a solution: 1. c(x, rep(NA, n-length(x))) 2. which(x==2, arr.ind=TRUE)
Cheers Andy __________________________________ Andy Jaworski 518-1-01 Process Laboratory 3M Corporate Research Laboratory ----- E-mail: [EMAIL PROTECTED] Tel: (651) 733-6092 Fax: (651) 736-3122 "Eric Turkheimer" <[EMAIL PROTECTED]> Sent by: [EMAIL PROTECTED] 07/07/2008 04:09 PM To r-help@r-project.org cc Subject [R] Basic Vector and Matrix Operations I am wondering if it is possible to perform the following two basic functions with primitive R functions. I know I could write functions for either, but it seems as though they are probably built-in somewhere. 1) Fill out a vector to a desired length with missing values or zeros. So, x<-c(3,4,5) f(x,5) 3,4,5,NA,NA 2) Find the [row,col] location of a particular value in a matrix, eg x<-matrix(1:9,ncol=3) f(x,2) 2,1 Thanks. -- Eric Turkheimer, PhD Department of Psychology University of Virginia PO Box 400400 Charlottesville, VA 22904-4400 http://www.people.virginia.edu/~ent3c 434-982-4732 434-982-4766 (FAX) [[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. [[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.
